Gonna be difficult to find, especially since you need wheels(musta been calcium in there). but repost here: Cub Cadet Yanmar & CUTs , amd check E-bay.
EDIT: Call these guys in the morning: http://www.messicks.com/ They may be able to help. And have those part numbers from the previous thread you posted to handy.
I contacted these guys once and they said they can build wheels to order if you give them the bolt spacing and hole diameters. I would call or email them to arrange custom patterns if they still do that.