I needed one as well, so last year I got this one. First I ordered the 16' one and it fit like an oversized diaper - horrible. Being amazon, I figured what the heck.. and ordered the 13'. Fits like a GLOVE and I have a rack with
solar on top.
Classic Accessories Over Drive PolyPRO3 Molded
Fiberglass Travel Trailer Cover, Fits 11' - 13' Trailers (80-295-153101-RT)
More information:
https://www.amazon.com/dp/B01KHX2I4A...ing=UTF8&psc=1
When I purchased it, the price was $131.69... now there are some 3rd party options for $299... global shipping nightmare I guess. I don't have snow where I am, but in the pouring rain, this thing worked extremely well and it keeps the bird **** and tree sap off my fiberglass.
Hope this helps
Jason