After Almost 2 years of running the voltage refernce with its "brains hanging out" I have finaly made some more progress.
Voltage Refernce and Buffer Board
Linear Power Supply
To power the voltage refrence form the the AC mains, I have made a simple linear regulator board. I have used the same board outline and edge connector as the voltage referance. The bard will take in AC voltage form a center tapped transformer and out out the +12v and -3v requited by the design.
I have sent off the gerbers to OSH Park and will post the Eagle database once the boards are back and tested