One thing to consider is what the wheel comes off of if you go that route. I put a simplicity front wheel on a JD last year. Offset was different but it stuck out from the tractor slightly more but didn't interfere with anything.
Another option is welding closed the original hole and redrilling it possibly.
A generic front tire, your size, is about$30 at my local farm store. Replacing it is probably the easiest and simplest way.