ToySport are probably still selling two 152E engines (16 valve 18rg)
They have been reconditioned and at least one of them has been built for turbo application.
and the price... wait for it...$7,500 US.
If you wanted to buy one of these, I reckon I'd do it soon, while the AUS dollar is still good.
I reckon the money would buy a pretty god engine, probably around 500hp, maybe more, depending on what you do for a turbo.