It's been a while (2006) since we've used their service, but Gary's Freeway RV on the north side of I-84, where highway 50 meets it at Eden, used to handle Holiday Rambler coaches, and they did a good job on our Monterey's warranty slideout issue. You can get there going east out of Twin on the Kimberly Road (30) or I-84. Their website isn't active apparently, so I don't know the status of their business right now. You could give them a call and see if they are a feasible resource for your windshield: 1-800-826-5336.
Joel