I've seen a few posts from people enquiring about the silver plastic airbag trim for their motors, whilst looking though ebay I stumbled across this. The actual listing has finished, however there is some links in it to others though. hope this helps someone:
http://cgi.ebay.co.uk/Renault-clio-02-silver-interior-airbag-trim_W0QQitemZ4629990279QQcategoryZ10410QQrdZ1QQcmdZViewItem
http://cgi.ebay.co.uk/Renault-clio-02-silver-interior-airbag-trim_W0QQitemZ4629990279QQcategoryZ10410QQrdZ1QQcmdZViewItem