I'm sorry about your pain, Tee.
If it's not in clinical trials, it's probably not worth looking into.
cesium chloride is found in mineral springs and in seawater.
You'd probably feel better putting some in a warm bath. (** but I've never tried
it)
If no more radiation is possible, it's best to get involved with hospice, who
should be able to help you with the pain.
Keep in touch and let us know how your're doing.
J

Personally, I don't think that cesium chloride helps in cancer. It's
use seems to be based on the idea, that cancer has low pH, and trying
to raise it with cesium or rubidium could somehow help. However, low
pH of cancer cells is not a cause of cancer, but just the result of
lactid acid build-up in tumors in hypoxic conditions caused by poor
supply of blood into the tumor.

I don't know anyone who has used cesium. I have sometimes looked into
it and found some information of questionable quality. I provide this
info below mainly for historical reasons. I'm not endorsing or
recommending this kind of treatment,

This line of research was apparently originated by Aubrey Keith
Brewer, Ph.D. Dr. Brewer died in 1986, and it seems that this research
died with him. The site

Brewer Science Library--Brewer Articles
http://www.mwt.net/~drbrewer/brew_art.htm

contains some of his work. Especially the article

The High pH Therapy for Cancer
Tests on Mice and Humans
A. KEITH BREWER, Ph.D.
(Reprinted from Pharmacology Biochemistry & Behavior, v. 21, Suppl.,
1)
http://www.mwt.net/~drbrewer/highpH.htm

may be worth reading, if one is interested in forming an opinion about
this therapy.

Below also some Medline references:

1: Pinsky C, Bose R.
Pharmacological and toxicological investigations of cesium.
Pharmacol Biochem Behav. 1984;21 Suppl 1:17-23.
PMID: 6543004 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
543004&dopt=Abstract

2: Sartori HE.
Nutrients and cancer: an introduction to cesium therapy.
Pharmacol Biochem Behav. 1984;21 Suppl 1:7-10.
PMID: 6522434 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
522434&dopt=Abstract

3: Messiha FS, Stocco DM.
Effect of cesium and potassium salts on survival of rats bearing
Novikoff hepatoma.
Pharmacol Biochem Behav. 1984;21 Suppl 1:31-4.
PMID: 6522431 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
522431&dopt=Abstract

4: Messiha FS.
Biochemical aspects of cesium administration in tumor-bearing mice.
Pharmacol Biochem Behav. 1984;21 Suppl 1:27-30.
PMID: 6522430 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
522430&dopt=Abstract

5: Tufte MJ, Tufte FW, Brewer AK.
The response of colon carcinoma in mice to cesium, zinc and vitamin A.
Pharmacol Biochem Behav. 1984;21 Suppl 1:25-6.
PMID: 6522429 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
522429&dopt=Abstract

6:  Sartori HE.
Cesium therapy in cancer patients.
Pharmacol Biochem Behav. 1984;21 Suppl 1:11-3.
PMID: 6522427 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
522427&dopt=Abstract

7:  Brewer AK.  
The high pH therapy for cancer tests on mice and humans.
Pharmacol Biochem Behav. 1984;21 Suppl 1:1-5.
PMID: 6522424 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
522424&dopt=Abstract
http://www.mwt.net/~drbrewer/highpH.htm (full text)

8: Messiha FS.
Effect of cesium and ethanol on tumor bearing rats.
Pharmacol Biochem Behav. 1984;21 Suppl 1:35-40.
PMID: 6395134 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
395134&dopt=Abstract

9: Brewer AK, Clarke BJ, Greenberg M, Rothkopf N.
The effects of rubidium on mammary tumour growth in C57 blk/6J mice.
Cytobios. 1979;24(94):99-101.
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=4
3800&dopt=Abstract

10: El-Domeiri AA, Messiha FS, Hsia WC.
Effect of alkali metal salts on Sarcoma I in A/J mice.
J Surg Oncol. 1981;18(4):423-9.
PMID: 6275211 [PubMed - indexed for MEDLINE]
http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=6
275211&dopt=Abstract