A lot of RV carcasses get auctioned through Copart.
The problem is, even if you could find a listing for a compatible vehicle, itís not clear to me to that Copart would divulge the buyer.
I feel your pain - Iíve been trying to find a way around this same issue for more than 7 years now. A few years back, someone on Air Forums had their rig totaled by a semi-truck - sheared the front end right off (the owner was not injured). And I thought awesome! - finally we can trace a compatible vehicle and whenever one of us needs a part, we can contact that yard and buy it. Especially parts like windows, which are no longer manufactured in compatible form, as far as we know.
Alas, how to find out where that particular wreck ended up, so we would know where to go?? We never did solve this.
Pic of the results from the Copart auction listing: