Randy,
If your
Scamp has the square cornered
windows, then it will probably be a challenge to find them new.
If you have the radius-cornered
windows (probably not in 1983, I realize),
Scamp sells them for about $128 plus shipping/packing. For about $20 or so more, you can get a radius-cornered jalousie window of the same size.
http://shop.scamptrailers.com/ (opens directly to parts store)
Some people have filled in the corners of the rough opening for the square windows in order to be able to use the radius-cornered ones.
My first thought when I was trailer-musing, early on, was "Oh, if one got larger windows, you could put radius-cornered ones in without filling the corners in." But of course I quickly realized that you would run into cabinetry width-wise, and curvature height-wise.
I think the windows can often be rebuilt or repaired, if you still have the originals.
Raya