Have F2260, need snowblower, is the shaft really spinning the wrong way?

Hi,
I'm posting for my brother in law. He got a fairly beat up Kubota at auction. He needs to look up sizes on the tires to see what it would take to replace them. Aftermarket or even a 'close' size that would help on cost would be great.

His auction find:

Public Surplus: Auction #1390550

(not sure how long this link will be good, if someone wants to embed the pictures into this post, I'm not sure how to do this yet)





He also is looking for the snowblower. He believes the only one that will work is a F4210b If that is true, they seem impossible to find.

http://www.assettradex.co.uk/1w414h291_kubota-f5210b-1749593-3.jpg

And when you do find them they are VERY pricey:

(1) Kubota 52" width snow blower, model F5210B, s/n 2900529. Att... - Orbitbid.com®

He is finding out that the pto shaft on the kubota spins OPPOSITE all other pto drive snowblowers and that this snowblower works only after there is a PTO direction REVERSER in place? Could that be that it was engineered to run a PTO the opposite way the attachments work? There certainly must be a good reason for this!!

He is trying to retro fit another front PTO snowblower, maybe from a F series JD or other similar. Can someone give us some options that are easier on the budget?