On a long out-of town trip, I'm not particularly comfortable, not having a spare tire on my 2007 MX-5 with 17" wheels. So I am considering getting a spare. Elsewhere I read that a 16" compact "donut" tire (5 lug-nuts) from a Mazda RX-7, RX-8, or Mazda 3 will fit my car and in my trunk.
Does anybody have one of those spares, or know where I can get one?