Rear End Brake Line Bolt - Help!!

I have a 78 Grenada rearend in my 65 Mustang. The threads are stripped on the bolt that holds the brake line distribution block. It is a tubular bolt, that has a hole up through it and a nipple that the vent tube slips on. I can't find one, the Ford dealer can't get one, none of the parts houses have one. Can anybody help with a source for the bolt?? I can send a photo if anybody knows a source that is online. Thanx!!

toyshop said:

If all else fails, drill hole oversize, tap to next larger size, saw hose nipple off old bolt and TIG to new oversize bolt AFTER you drill hole thru new bolt.

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Tried two junkyards. Most cars that old have been crushed (at least around here). Maybe I will try a small town 'yard or two. As for the larger bolt, I thought of drilling through a new bolt of the same size, then attaching a piece of tubing for the vent. Problem is: since I retired, I don't have access to a lathe to do it right. Thanks for the thought generators, though.