Alloys on a clio

[Sundance_Kid]

Hi all!,
I have a renault clio, i recently got hold of some 5 spoke cobra alloys, thing is they don't quite fit, apparantly they need shims becuase the clio rim is smaller than the inside of the alloy, only by about 3mm, but it needs to be packed out to be safe, thats where the shims come in, i was gonna go to a local mod garage but they went out of business so i was wonderin if any of you guys an gals may know an intenet site or mail order place etc i can go to?

Any help greatly appreciated.
Cheers and av a good christmas!