It's a bit addictive looking at prices and availability of parts on the Fowlers website
A full set of carbs is £1,391.62 inc VAT.
A set of exhaust downpipes is £1098.61 inc VAT.
A new frame is £1,735.56 inc VAT.
The part I'm after, 'Lever 2', is £55.80 inc VAT.
Unobtainable parts (even by Back Order) include the Silencer assy, Rear light unit and Fuel tank.