Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
You could try Wingovations, he specialises in Wings and repairs and such, in fact he's the one drilling my discs for me. And he's in Glasgow, Scotland as well, keeps them local.
Yeah James, you seen his fix for the broken carb float pillars, really nice little mod that, saves a carb from being thrown away. Would probably work on the 500/550 carbs as well.