You could probably have one made......
I'd just upgrade to the axle with the needle bearing. One of the sponsors can hook you up I'm sure. Much better set up, the bearing is.
I do not know if you can just use the bearing instead of the bushing...... someone here will know. I just know that in the next tractor series they went to a bearing. Don't know if the tubes are different.
Axles are the same.