Baja dirt runner 125 rear wheel

[Seberg77]

I just bought a Baja dirt runner 125. The rear wheel rigged on and now I am trying to find the right parts. I have 2 spacers but the schematic looks like there is 3. There is also a stepped spacer/collet, that i don't have. The schematic shows it between the sprocket assembly and the hub. I am wondering if anyone has one for sale or provide me the measurements. Thanks for any and all help. I have include a picture to help.