That division, Thor CA which was sold to another company which eventually went belly up is gone. That said very little of RVs are really proprietary. You can find a good shop to do repairs. Sometimes it's looking for the odd ball ones. We found a great place in Eastern Oregon that did some pretty massive rebuilds of RVs, all the employees had worked for various RV factories previously.
Two Wire Fox Terriers; Sarge & Sully
2007 Winnebago Sightseer 35J
2020 Jeep Gladiator Rubicon