OK, I'm getting really frustrated.
About 2 years ago, a landscaping truck in the storage yard where we pay to keep our Sunline, bent the front left window.
Basically the only part that is damaged is the lower of the two louvers. The glass is cracked (that wouldn't be a problem) but the metal frame is also bent up too badly to straighten. One corner is accordioned back - see photo below.
SO- I started on a quest.
First there are absolutely NO stickers or other identifying marks on the window. I've done everthing but remove it from the wall of the camper, which may need to be my next step.
I drove it by a Camping world and several other dealers in the hopes that a experienced service manager would look at the window and go "Oh yea - thats a _____ brand window." But everyone that looks at it just shruggs and says "I have no clue! Doesn't look like any manufacturer I've ever seen."
I've personally walked some HUGE RV sales lots looking for a new unit - of any brand - that has the same design window and I can't find one that matches the style, look, color, etc.
Thanks to some previous help in this Forum I contacted Stoltzfus and several other dealers who are listed as having been near the factory. Stoltzfus claims Sunline used Hier windows in 2004.
SO - I contacted Hier - even sent them closeup photos of the window. Their sales manager claims they never sold windows to Sunline and it doesn't look like one of their windows in the photo.
The only workable option I've come across so far is All-Rite - who will custom manufacture a window to fit in the opening (but no guarantee it will match the rest of the trailer). I haven't been brave enough to ask how much that will cost yet.
I have to believe that if I can just figure out who manufactured this window for Sunline that I can get just the lower louver as a part.
But I'm about at the end of my rope.