programming cradle

I've been looking for any engineering or wiring diagrams out there for the Apollo Pilot XP programming cradle (it's actually part of a multi-unit programming cradle, but I suspect it's just different connections to the serial interface) to reprovision some older second-hand Apollo Pilot XP units...

WTB a programming cradle for apollo VP200 pagers. I have tried to make one myself out of a charger and so far have been unsuccessful, if anybody has one they can part with, OR might be able to tell me what i am doing wrong with making it, please let me know. Thank you