I found a swivel caster and my trusty bucket 'o' random stuff!
And a few pieces of scrap wood.
Predrill all bolt holes, I found carriage bolts. Thread nuts on top of mower not below in the blade hosing! You could damage the blade.
Mount the new wheel and trim the wood.
If the spark plug wire is in contact with any bolt, cut excess bolt or wrap bolt with a high temp silicone tube. For some reason, the mower wouldn't start until I did this.
Mission completed in about 45 min!
Lawn mower works even better now! Rides smoother and turns without picking up front wheels! Win Win!!!!
Thanks for looking!