Rim replacement

[webcrum]

Well I’m not sure if my tractor is vintage or just old. I have an early 70’s John Deere 301j. The rear wheels were filled with calcium when I got it. Now one rim has corroded and needs replacement. I am looking for advice on what rims will work and where to find some. Currently I have steel disc single piece rims. 14.9X24 tires. I believe it has a 8 lug pattern with a 8” center hole.
Thanks for your help
Ed