This is probably not going to help you, but I seriously doubt you'll find used or new parts for a 27 year old motorhome that is long out of production.
There are a couple of RV grave yards, but that's super hit or miss: Colaw's and Visone are the two biggest.
My 1993 Winnebago Vectra with Cummings diesel pusher has very rusted cargo doors .I was thinking of replacing too but looking at this post seems not much chance. Please let me know if you are able to locate any.
Many Thanks.