Sun used to have an equipment maintenance phone hotline with an 800 prefix, but when Snap-On bought the company in the late 1980's I'm pretty sure they stopped, or at least severely cut back on servicing the older equipment. Those machines and test lead sets come up on Ebay pretty often. Try a search there. I was once a regional training director for Sun, just before the big switch to Snap-On took place. My job got cut pretty quickly when that happened!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!