Crankshafts of this type are not available new, however Revington TR has a selection of used crankshafts, which will accept a regrind. We keep these under this (307546SH) part number.

When changing a crankshaft it is important to know if you have a 'short back' or 'long back' crankshaft. Please read information sheet IS0035 (downloadable via the link below) to find out how to identify the crankshaft in your engine.
Later short back cranks are kept under part number 311322. See below