I have installed some custom leather seat covers over my stock miata seats, and they are really pretty damn nice, they fit perfect, they dont have any strange bulges or seams in places where they should be, they are made for the miata and nothing else so I guess thats why they fit so nice...I would deffinately recommend these I will get some pics up shortly...

http://www.rufftuff.com/addvert/mazda9900.asp