[cycleguy55]

I replaced the seats in my West Coast Cobra with a pair from a Honda Civic Del Sol. IIRC, measurements indicated I had 19" of width to work with, and the Del Sol seats fit - barely. I'm told seats meant for Lotus cars (e.g. Elise, Exige) will fit as they're narrow as well. Seats for Mazda Miata may work.

Part of the issue is obviously whether they fit in the car, another is whether they fit you. I really like the Del Sol seats - they fit well and are quite comfortable, plus I found them locally and the price was dirt cheap. Win, win, win - but that doesn't mean they'll fit the next guy.