Ive seen silver speedlines, an exact copy of the Williams alloy. They were fitted to my 1.9 205 GTi !!! Have you checked they have the correct PCD?
But no wait, as I sit here in work witing for some ill people to arrive, I remember sending an article to Jas. In it was an article about the Clio Elf Cup. If my aging memory serves me correctly, the Clios had Williams type wheels and were silver. See if Jas has the article still. They were comparing a 5TS, a 5 Turbo and the Clio 16v one make series cars.