[bah humbug]

Nobody makes the R33 engine. But you coud do a conversion with the R32 engine and put it in the R33. (not easy) A couple of people on this board have put the R32 engine in the R34, haven't seen it done with the R33 though.

Although People make engine for other kit's that do not come with engines.

I think I've seen someone here had a scooby with an engine.
i also know that there is an S2000 engine, although expensive.

You'll have to get the R33 wheels from the R34 kit.