One like this: http://sacramento.craigslist.org/cto/2333210506.html
Actually, that one. According to the owner, the last cambelt change had been done at 85k, so I guess I'll have a few months until it wants one. One little detail that's missing in the ad is that it needs a new top - the owner doesn't mention what the damage to the top is (I tried, the response was "needs a new top") but supposedly it has all the M-edition goodies still.
Of course I'd still need a hardtop, which makes the price a little high for my liking, but decent Miatas seem to be pretty expensive out here.