Ultra Shield Race Products are currently 12 weeks out on aluminum seat orders. If you need an Ultra Shield Spec Miata Seat quicker than 3 months, RaceDaySafety.com has inventory on 15 inch, 16 inch, 17 inch and 18 inch models (as of now, they move fast).
http://www.racedaysafety.com/spec-miata-seat-cover.html
