There are plenty of "new old stock" condensers available on Ebay. Shop for "Delco Remy" (NOT "AC-Delco) Since about the only difference in most condensers is the length of the pigtail, don't limit your search to "Chevy six" items. Back when I was working for a living, feeding my family and paying rent fixing these old rust buckets, failed condensers were incredibly rare, even if they didn't get changed at every tune-up.
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!