There are plenty of great engine builders in Australia.
Danny, if you really want to know one, and you really want a high output Honda engine, PM me and I can put you onto our engine builder. He is doing our RB31DETs, highest of which makes 1300bhp, and has previously done our 2litre B18. If you really want to do it, keep it local. Its cheaper and just as reliable. And you'll get more power for your money, IMO