343x32 - You
may be able to machine a few mm off the pads to squeeze them in, I don't know if the caliper would accept that?? Speak to Dave.
There's a few other things to consider though:
I don't know if the offset of the bell is the same as OEM, I don't know if the pad-swept area is the same and I don't know if you want to be spending that kind of money on a set of discs? think £700 ish.
If you find the answer is positive on all those, then ring John at
EARS in Macclesfield - he'll give you the best price on discs & bells.
Alternatively, just buy an Alcon kit off him - the car will do stoppies, believe me.