Massivley expensive brand new mate. Grand plus.

Eaton M62 should do you just fine, if you want 300odd, or maybe an M90 at lower blower RPM.

Can get both off ebay easy enough, thas what id do, tho most likely to be ebay america.

I guess a centrefugal one is easier to mount as its more compact, but they dont give the instant boost a screw type one does.

Ive got a Mini Cooper S M45, but M45s are only good for 250bhp at most.
Though i guess you could run twins, but pointles when you could just get a 62 or 90.

http://www.automotive.eaton.com/prod...erchargers.asp