Reliable End Mill has a couple HP3586C recievers for sale on EBay -- along
with some other goodies -- I point this out since I am delighted with the
ovenized 3586C which I own. There are also a lot of other HP goodies,
probably going cheap, on his list of auctions. (This isn't a bald plug for
REM, but I have dealt with them in the past and they are good guys.)

http://cgi.ebay.com/ws/eBayISAPI.dll...EBBI%3AIT&rd=1