Guys,
Any competent seamstress (seamster?) could make one of these using Sunbrella (R) (note that I respect registered trademarks!) which is what the professionals use to make outdoor soft furniture and shades. You would use the same procedure as to make a fitted chair "dress." It also works great for large roll-around BBQs--
I made one for mine.
The problem is, on a publicly parked car, how do you keep someone from stealing your wonderful creation?? I suppose you could lace it on underneath the top and roll up your windows...
Trice
1968 280SL US, signal/bl leather, auto