In my continued search, it seems there is another option.
New Vintage USA seems to be pretty new on the block, but they have some very attractive gauges and do custom work. This one was from a diesel swap in a 72
I'm sure its not cheap. Their "67 series" isnt too far off from our stock ones and they really nailed the muscle car style IMO.
I'm waiting on getting quotes back.
http://www.newvintageusa.com/1967.html
Another update, Dakota Digital just released a Cable-X competitor for $300 that converts digital signal to mechanical for your factory gauge. This was the answer I was looking for but now I've decided I need a 6-7k RPM tach
