I have a 7320. I bought set of tires same size off a Kioti 6620. My 7320 rims are a solid welded rim. The 6620 are a two piece rim. They are virtually the same tractor but the rear ends are different and the bolt pattern on the 6620 is 8" center and the 7320 is 9" center. Does Kioti or aftermarket make a center that will bolt onto the 6620 rim to make it 9" on center to fit the 7320?