Like Eric:
I have a Covercraft Noah [no, not the Dorki in Israel] for my '76 and '62 and a Covercraft Weathershield for my E30 iX. We have Noahs' for three other race cars.
Weathershield is Excellent ... Noahs are very good IMO. Keeps heavy rain out of leaky Targa tops and open windows [no glass, regulators, etc...] on the race cars.
Happy with value and would purchase again. [prolly need to for the Targa]. Do NOT wash in a machine ... hence the need for a new one for the Targa .... maybe.
BTW the early 930 turbo cover [largest for 911 body] does not completely cover our '73 IROC bodied [early whale tale] car ... tight stretch b/c of flares, etc...
Covercraft also makes excellent foldable thick foam board UV protecting sun shades. Exact fit on my 911, E30 and '99 Suburban ... work very well ... too.
*no affiliation .. previous boat owner and liked their products from then