Try our re-instated info resource - "Aladdin's Cave" (Main menu)- sorry it's taken so long to fix
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.