All,
Motor and gear ssemblies that were made by Lippert are still available through Klauber Gear (636-257-3002) or (KlauberGear.com).
Part number usually starts with K01........., and it comes as a complete unit.
If the one you need is not in stock, the lead time is about 3 weeks.
My assembly was part number K01285A300 and cost was $465 plus shipping.
Regards,
UPDATED: 26 OCT 2021
Available through Precision Electric Motor Sales
800-234-5687, Ext. 1