Well, I was going to respond this AM but forgot. If it is a 5/8" setup that is fairly common, as I recall. In fact, think I have a quick release around here for that size - maybe. I'll look in the AM.
All you need to do is call or email just about any good race shop, tell them the spline type, and tell them you want it for a Momo pattern. Easy. The adapter will weld onto your spline shaft and you'll be good to go.
There is no doubt there is one that fits, just give your favorite race shop a call. Might as well pick out your wheel and order it as a set, might save a few bucks. Personally, I've found better value with "non-momo" wheels, but I'm a cheap skate my racing buddies tell me - a little tennis racket tape goes a long way to improving the feel of a $25 wheel. And I hadn't noticed that the momo makes those guys any faster, in fact, I've beaten a few of my momo wheeled buds.
Anyhow, they make nice wheels and what you're doing is pretty simple, just give a shop a call and you'll be in like Flynn.
Ron