In case anyone's interested in more suitable footpegs, I've just received these through the post:
http://cgi.ebay.fr/ws/eBayISAPI.dll?ViewItem&item=260562998402&ssPageNam e=ADME:L:OU:FR:1123
In case this link no longer works they are listed as 90-05 YZ80 125 250 500 WR 200 500 and the seller is called dormousesleep. The pegs cost me 20.99 Aussie dollars (which works out at 14.30 Euros here in France) including postage. Can't be bad! They were sent from China. I had second thoughts about the 'Made In China' tag but at this price I thought I'd at least try them out. They went on very easily and are a good fit. I've no idea how well they handle crashing (yet...) but they're certainly better for standing on than the standard pegs.
Cheers,
Rich