I sourced everything from Hitchcock's.
570805 Kick Starter Shaft Sub Assembly ( shaft, pawl, plunger, and plunger spring) 46.20
570284 Kickstart Gear Assembly 44.00
550030 Washer, Thrust 500cc + Sixty5 + EFI 1.32
570209 Circlip 0.33
570239 Oil Thrower 2.64
570240 Hex Socket Screw, M5 x 35 (X3) 0.66ea 1.89
146450 Spring, Kickstart 3.03
145090 Screw, Short .88
570241 Oil seal, Kick Starter (X2 or 3, I got 2) 1.00ea 2.00
861034 Cover, Kick Start Shaft Out Of Stock
500622 Kick Start Crank Assembly 36.30
Total=138.59
Prices are in GBP. Shipping was a whopping 41GBP, plus the other items I ordered, my total was $310.00. You'll need to find a machine shop to finish boring the case and the shaft cover plate (the plate behind the drive gear). Part 142257 Stop Plate, Foot Starter Pawl and 146714 Hex Screw were installed on the case at the factory, so you may want to hold off on ordering the parts until you open the case, in case you need to add them to your order. The holes for the oil thrower screws and the spring screw were drilled and tapped, so everything was simple assembly.