try a search for clutch and flywheel and you should find everything offered. I haven't looked into them so I am not 100% sure of brands..I think Focus Sport might have one and also I think another is clutchmasters. I am sure there are a couple more, but I don't know.
we wnt for a half hour drive the other night and i was driving my friends wrx and he was driving mine and i got back in my car and it would barelly move. tried a couple holeshot and sometimes it would spin em other times it wouldnt. im kinda pissed casue the cars brand new.