I was in Corvallis, OR when I had my knees replaced. There were
several places that rented mobility equipment. The forearm crutches
were a little difficult to find. The places I tried were from word of
mouth recommendations.
--
BettyB  --  www.flamingo-code.com
"I have noticed even people who claim everything is
predestined, and that we can do nothing to change it,
look before they cross the road." - Stephen Hawking

I don't know who makes mine, I got them through my local hospital here
in Western Australia as long term loan equipment. The physio who let me
try different types said that the previous hospital should have had me
on these years and years and years ago, the ones I had were only for
short term use. They immediately made a difference to the levels of pain
in my arms from walking using my arms on damaged shoulder, elbow, and
wrist joints for 8.5 years.

I've been looking around google and I've seen several manufacturers and
retailers already. They sell for around $85. There are two main sorts,
one with a molded plastic upper unit (forearm calliper and handle) and
one with an adjustable upper section (all lower sections are adjustable
with tightening collars to reduce movement of the adjustable parts).

The pro of using the adjustable upper section type crutches are that
they are adjustable if you need them. The pro of using the molded upper
section, in my view as I have never used this type, is that there's one
less joint to allow a few millimeters of unintended lateral motion (this
sh.ts me sometimes with crutches). Then again, the plastic may be
flexible enough to make this problem worse! As I've said, I haven't ever
tried this type.

Ari