Aquiring an Andymark GEM500 gearbox.

[Wenches]

Looking for a total of 4 stages of a GEM planetary gearbox + the output shaft assembly for a standard 2.5" CIM. mathematically this will give us enough grunt to get the robot off the ground and then a little mercy room to keep the CIM from burning out. but then again "mathematically" two andymark AM-2193 with the 188 gearbox would lift it, but we tested it with 80lbs, no good. hopefully can get some input on other choices

but the main problem we have is in order to USE a GEM500 4 stage gearbox, we must HAVE a GEM500 4 stage gearbox. so this is me begging/searching for a chance to get one. they're out of stock on andymark's website right now. any help would be much appreciated.