As Scroggs says you can fly ex military types like the Hunter, Gnat, L-39, L-29, Jet Provost(not exactly high perf I know!) etc but you wont be getting paid for it!
You can get more info on that over on the private flying forum if you do a search or you can PM me for info on flying the JP.
Actually, technically you can be renumerated for instruction on these(conversion to type) so I suppose you could get paid but not enough to live on!!
Hope that helps....
Regards
UA