Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Front yes, back no
Apparently there are a few differences between the 750/500/550 rear mudguards, different cable holes etc but will interchange as long as you are not a purest. On my 550f2 i have a 750 with a 341 number and it fits fine
I think it was similar to ebay item 275407311712 and at £16 for stainless worth a try
My pal bought one for his 550 and its not sized very well. It's meant for a GN 125 which has a smaller back wheel, if you want it to fit you have to spread it out and it looks weird. Save yer money.