Well the H22 is probabaly the easiest of the Prelude engines to find parts for.

Most places that carry engine parts for the Prelude.... have em for the H22 before the H23 and the H23 before the F22.

www.coximport.com is good, I know a couple people that have bought from them. I bought some brake pads from them, very quick and easy to work with.

Seriously, check out some of the sponsors of HAN up in the right of your screen there... most of them carry Prelude parts of some kind or another.