Just checked their site $81 & $13 plus $17 shipping. Where did you get those prices?The Miata knob is fantastic. It "feels" heavier, but it is smaller than the what came with the car. I have small hands so I really like it. Just stop in at you local hardware store and by a nylon spacer to take up the gap. Pop the trim and slide the spacer on. No big deal.
I ordered from Amayama Trading Co. If you don't mind waiting it will save you $50.
Mazda N24346032 - CAP, PLASTIC - 10.61 USD (1 items)
Mazda N24446030B - KNOB, SHIFT LEVER - 66.67 USD (1 items)