Documentation On Legacy Casi Product

I have recently started work at a company which deploys and supports legacy Casi access control equipment. I am having a difficult time tracking down information on these products or finding any actual support. Specifically I am looking for manuals and specification sheets on this product but am not having much luck. Basically I am looking for anything pertaining to the M3000/M5/M2000 panels, their add on cards, Picture Perfect, Etc. Can anyone point me in the right direction as finding support from the behemoth that is GE/UTC is difficult.