I just happen to be at Marshall Machinery in PA this past Thursday checking out all the AC tractors they have in their "boneyard". Saw 2 "C"'s there with PTO guards. I don't have their phone number on me at the present time, but I know they advertise under Allis Chalmers on the Internet. You could probably get their number there. Ask for Brian in the used parts department. Nice guys to deal with. If you have trouble finding them, e-mail me and when I get home I'll shoot their number to ya.