This set  works out slightly cheaper than buying the parts individually. It consists of the following items which can also be bought individually:
1 set of Lightweight Webb Girder Fork Spindles
1 set of Lightweight Webb Fork Spindle Nuts
1 set of Lightweight Webb Fork Knurled Washers
 
This set will fit Lightweight Webb forks as fitted to the 1930's Velocette MAC and MOV with the friction damper on one side.