Jerry.... there may not be a forum on the net for Newmar products other than the one sponsored by the Newmar Corporation called "Newmar KountryKlub". They have a fabulous owner's club and it would be very hard to be up against that paticular club.
http://newmarkountryklub.com
Maybe if you contact the president of the region that includes your state they might know of another site online. Your contact people would be:
Region 4
Floyd/Karen Rothfuss
2603 S0 80th Ave
Omaha, NE 68124-3114
402-397-9872
www.newmarkountryklub.com/regions/region4
Have you tried posting a message over at
http://rv.net or
http://rvusa.com to see
if anyone there knows of a site?
And last, but certainly not least....... you could do as "Northstar" suggested and take a look at Keystone Montanas....
Good luck in your quest.