yamaha promix 01

A tech is currently refurbishing my Yamaha 03D console, whose ergonomics, MIDI implementation and built-in effects I love (I'm more creative with this old console, which I can play like a synth to create crazy sounds, than with newer ones).

Unfortunately, most of its faders are dead and Yamaha doesn't supply them anymore. It's almost impossible to find them new on the net, or not enough of them. If my info is correct, their part number is VZ523400, and they are exactly the same as for the 01V (original version), ProMix 01, AW4416, AW2816.

Anyone know where in NYC I can get a blown channel fixed? Or maybe change the A/D converters to 24 bit?
Thanks in advance. .WAR