6 bolt to 6 bolt ultra light-weight steering wheel adaptor. Available in 1/2" and 2 1/2" to achieve the desired spacing of the steering wheel.
350mm (13.8") Black Suede Momo steering wheel. This wheel is deep dish design wheel, so it will bring the wheel rougly 1.2" closer to you than a flat steering wheel like a Momo model 78.
Momo model 78 350mm (13.8") steering wheel. This is the perfect size for the Miata. It is about 1" smaller in diameter than the stock steering wheel.
Momo 320mm Flat Bottom Steering Wheel