There are a number of slide systems that are obsolete. My bedroom slide is the same way, I was concerned on mine and was looking for a new slide motor/gear box and I contacted Lippert, which bought out the company years ago and pretty much said they do not support it.
It would be a crap shoot on getting the RV but if you could a good inspection of the slide out mechanism/system you might find an easy fix. Never know.
FYI, I just spent ~$10k over the last year on my investment, new tires, fuel transfer pump, second inverter, new AC's, new flooring. Got to pay to play!!
2002 Monaco Windsor 38 PKD Cummins ISC 350 8.3L
2005 Jeep Grand Cherokee w/5.7 Hemi