Charlie,
I have the same problem with my 322 and will be repairing it soon. All the parts are still available. You will need to remove the front axle and replace the bearings and probably the pivot bolt. I ordered new plates and adjustment bolts. The parts diagram is available online at jdparts.com. I ordered a couple other things also but I think all the parts (bearings, bolts, plates, etc) for the front axle were around $90.
Bob