I have learned a lot about this landing gear:
1. Most are made by Lippert Venture Mfg makes many of the gear boxes.
2. You damage them by retracting them all the way to the "stops". This is because there aren't any. Going too far just bends the shim washer, eventually jamming the gear. I think I did this.
3. Its expensive, and if it happens away from home (I was dammed lucky that it did) it can be really hard to get fixed.
4. I would still be looking for the parts had it not been for the guys here on RV net. Support for RV's is getting thin here in the SF Bay Area.
Regards
Bill