Farmall Cub

Does anyone know the diameter of the double pulley that goes on the PTO shaft of the tractor (p/n 542392R1 and p/n 542386R1)? I have a snowthrower and am trying to get it hooked up, etc. At this point, the only piece that I KNOW I'm missing is the pulley. I think if I can get the diameter, I can find a pulley.
Any help appreciated.
Thanks, Harvey

Harvey, I'm sorry but I don't know the answer to your question, but do you happen ot have any pictures of this snowblower? I am thinking of making one for a regular cub, and some pictures would help... Thanks for any help, Johnny