Ken,
Consider calling a friend of mine, Don Bock here in NJ. He owns a buisness called Passenger Car Supply and his specialty is '65-'72 big cars. He also used to work for CARS way back when they were just in the upolstery business. Donny knows where to find rare materials that aren't listed in anyone's catalog. He also works for American Auto Wire (which used to be Factory Fit, and Parker Wireworks before that). He can solve ANY wiring issue on these big cars.
I recommened him highly. 856-467-7966. You'll most likely get his machine during the day when he's at his regular job.
Ask Donny about Just Dashes. Perhaps he can work a better turn-around time for you.
Hope you make out ok. The car looks great!!!
Verne