I understand the motor is a standard part to an electric window system on an American car, possibly one of the GM brands. I recall someone replacing the motor (and gear assembly) with one from an auto parts store, and it was a lot cheaper than ordering one from Kwikee.
As for lubricating the steps, I totally agree. Almost every time I've had a problem with the steps, it has been due to a bad ground or lack of lubrication. I just clean the ground and re-lube the friction points, and they then work fine.