I have some on my Jetta, I would say just go ahead and get some, because I think they are a discontinued size, and the performance tire market for 14's has been all but abandoned
Edit: I can post pictures of how they fir on my wheels if youd like
If I could get pics of them on a Miata that would be awesome, but I'm not sure if your pics would help, thanks anyways though!
What I really want to know is if the smaller tire size looks silly on the rims that already don't fill the wheel wells at all with stock tires. I know it will change speedo readout and cruising rpm, but I don't go on highway much anyways so nbd. I might just throw another set of all seasons on the stockers until I can afford the rims I want in 15" with better tire selection. Also that way if I want to go out in colder weather when we move to where they don't salt the roads for next winter then I can without too much worry on all seasons.