I have had very good experience with car covers from Chisholm Coach
out of Georgetown, Texas.  Over the years, I have purchased "Evolution 4" and
"Noah" all-weather covers for my '71 Super Beetle, "72 Sportsmobile camper,
girlfriend's '79 Volvo, and my '86 Civic 4WD wagon. They have all fit
beautifully and held up well, and the prices were reasonable.  They even
threw in a matching antenna sleeve at my request (for me to sew on) for no
charge. (512) 869 5114

-chris  (no affiliation, etc...)