I have a 1976 I believe MCI-8 with 12r22.5. I had someone steal my tag tires. I had a spare but now need an aluminum rim for the 2nd one. There are 10 lug nut holes. On a tape between 8-9.5 inches wide where the tire meets the rim. I want to make sure I get the right one. on the inside it says Alcoa on the rim. Suggestions? I searched rim size on the threads and could not find it.