Gray Research broadcast equipment wiring diagrams.......

Well I'm working on a bunch of Gray Research broadcast turntables and pre-amps.....I can;t find any wiring diagrams or manuals for any of it......Does anyone have any ideas about where to fine that stuff..............I have looked in the Vinyl Engine website without any luck.....What I need is a Broadcast engineer.....They are the people that hooked up all that stuff.......THANKS