I've done business with the folks at General Gear and Machine in Boise, Idaho. As mentioned above, John Parks, tractorparts.com. 208-342-8911. Been getting stuff for the D-6 9U recently. I have got some stuff for the old Cat 12 Grader in the past also. www.tractorparts.com/
Grader parts I've got at Weller Tractor in. Great Bend, Kansas. www.wellerparts.com/