Tractor tires (Princeton Mn.)

Looking for rear 13.
6 X 28 inch tractor tires.
With some life left in them.
Farm tires or turf tires will work.
Have worn out weather checking on ours.
Willing to pay depending on condition? Need two Please pass this on to people that might have used tractor tires.
farmers, sod farms, golf course maintenance people, Rebuilders, collectors , restoration, implement shops, please help if you can.
In advance.
Thanks