For future reference, can you give me the contact info for Greg Wagoner? Is he a parts guy at Forest River?
It sounds like you already solved the problem, but just in case ...
Last week I got 3 of the lens (Glo Brite 122Y) from this place. I paid $2.10 each plus shipping.
Lichtsinn Motors
505 Hwy 9 East
Forest City, IA 50436
www.lichtsinn.com
(641) 585-3213
(800) 343-6255