BMW fitted car mats

I've got an E36 325i convertible and I need to get a set of fitted car mats for it. I have noticed that I don't have the fittings on my car to accept the car mat hold down clips, so what do I do?
I went to BMW Milcars in Watford and they reckon that I need to line up a set of fitted mats inside my car and then punch (or rather 'cut') a hole through the carpet and I should find the 'holes' that the hold down clips will fit into! Do I believe them and cut up my carpet?

Just get the fitted car mats and forget about the clips that hold them in place. They really don't move around that much.

www.bavauto.com