The AG built "charlie shaw focos":
http://www.motorsportads.com/race-ca...ars/19052.html
Or the Zen Imprezza for 15K less:
http://www.pistonheads.com/sales/1380233.htm
I 'prefer' the focos, but must admit if it was my money I would probably go for the scooby just because it manages to be just as quick as the Focos (in fact quicker than charlies one IIRC) but without needing so many expensive parts on it (gearbox at a tenth of the price etc)
What do other people think?