to the club.
The cats on a Zed are bolted on just before the Y pipe so you don't need to change the whole exhaust, I would have thought you could get your hands on some OEM cats for next to nothing. Try sending ZMANALEX or R35LEE a PM as they will almost definitely have some in stock. Failing that go for some High Flow cats or decat pipes for a bit more noise and power
Good luck with your new toy,