I can't check for you right now, but you *may* want to see if the TPS (Throttle Position Sensor) is the same as an Integra Type R and a 1999-2000 Civic Si. I'm almost positive that it is, but you'll have to look up part numbers.

If worst comes to worst, I'd suggest buying an aftermarket throttle body if you're going to end up spending that much. Get the 70mm Spoon throttle body. It comes with all the sensors.

(note: you may also want to become a member over at www.s2ki.com. there are a lot more S2000 owners over there that my know.)