I have a cockpit cover that I use to protect the interior of the car when we leave the top down with boot on for extended periods of time (like during work.) It goes under the wipers in front, straps around the mirrors, a couple of elastic straps in the wheel wells and three tabs under the trunk lid. Works great. The only downside is that it was designed for the earlier cars. The 2001+ Miatas have taller seats, AKA surfboards, and they cause the cover to have to be stretched when it is on. Over the last year that stretching has caused the cover to start to rip near the center tab on the back. John Haff to the rescue. He has an industrial sewing machine and knows how to use it. John sewed the ripping seam and added a gusset for extra strength. While he was at it he made me a bag to keep it in and a fender cover out of the same car cover material he used as a patch/gusset. Thanks John.
Next time this starts to rip I may just go ahead and buy a new one. The Crazy Red Italian has a cover that fit over cars with rollbars, so I know they will fit over the surfboards.