Knocker

I've just brought drilled and vented brakes discs for my 2001 3 series coupe,i've changed the front with no real problems.But when i came to fit the rear i realised the old disc are'nt vented,so the caliper carrier won't fit over the vented discs.Is there any where i can get them to fit without buying new calipers i.e can i just replace the carrier ?

I've just brought drilled and vent discs for front and rear brakes on my 2001 3 series coupe.I've done the front with no real problems but when i came to the rear i realised that the rear discs on my car where'nt vent which means the caliper housing bracket won't fit over the new discs.Is there any way i can get to fit the new discs without buying new calipers i.e can you just change the caliper housing bracket?

cheers It as got 18" wheels on would larger wheel cause the same problem?