I did a quick search and a place called LTB Motorsports has the Millenium for $257 plus hub adaptors for $58. I don't know if that's normal, high, or low.
The Grant I want is on the high side of $400. Add the hub and it's over five big'ns.
A quick scan at that site showed there was quite a range for Momo steering wheels ... $130-377. Most weigh in at $173 not including hub adaptor. It figures the one I want is pricey.