Wow… sorry to hear of your issues. Can’t say I’ve heard of anyone else having anything similar.
I’ve got hydraulic leveling on mine, so can’t help you with a part number. However, not sure if you’ve been on the LCI website or not, but here’s a link to their leveling & landing gear support page. Try clicking on the various options, to see if you can find your particular system there, and you should be able to find a parts sheet like (like those shown below) with the number you’re looking for.
https://support.lci1.com/leveling-and-stabilization/