They were made inhouse by Major Magic's in the very early 80s, they may have been inspired by CEI bots, but they are quite different so I tend to doubt it was something reverse engineered.
I don't believe it ever made it out of the prototype phase to my knowledge. Her legs are welded so it's possible they took it out but I don't think so. I don't plan on it as it would require me cutting her legs in half to fabricate their original system, which goes against preserving her. I wish I could see it in action too though!
