Move your post to the Alpine forum and you will get some responses. There are lots of motorhomes that the manufacturers have gone out of business. Personally, I don't think it is a big deal. Basically everything is an existing manufactured part except the body and frame. The Alpine group is pretty active and a good source of technical information. A lot of the documentation has been gathered into a searchable data base on the forum.
2001 34' Alpine Coach
2008 Jeep Rubicon or 2012 Ford F150 4x4 Lariat towds
or a couple of different trailers
Retired in Apple Valley, California