I'm looking for front tires for an AGCO 4x4 tractor(about 40hp). The size on the tire is 12.5x80x20 I've found some that a dealer has said would work sized 260x80x20. What I have found is priced between $300 and $400 a tire. It's hard to even find these tires. Has anyone else had this problem or know of a supplier that carries these tires. They look really similar to some of the smaller tractors rear tires.