In addition to Uhlman's I would also recommend Holiday Motorhomes, in Fife, WA. They were long time Alpine Coach suppliers until the last 1 1/2 years or so before the factory went down, and WRV changed to Uhlman's, since they were a large Alpenlite 5th wheel dealer. I bought my coach new in 2006 from Holiday and they have been very good to work with. They have a couple techs (a really good one named Justin) that worked on Alpines from the day they were released in 1998 until 2006/2007 (until the transfer to Uhlman's) and whenever I need something done, they always get it done right. They like Alpines and remember their needs well. The only issue is they may be backed up more than Uhlman's on their schedule. Bobby and Scott at Amazing Creations/Custom Coach Works in Junction City, listed above, also do good work.
If you need some heavy duty repair, you might also consider Carrier and Sons in Junction City. They did our steering bracket replacement before EM had a solution, and they have worked on a number of Alpines and a lot of Country Coaches, and they also do good work.
Former Owner, 2006 36MDDS
2010 Arctic Fox 22GK Travel Trailer
2007 Toyota Tundra