Your Kubota dealer can't cross-reference the old part number to a current replacement?
Try also filter manufactuer's TechRep hotlines or by email. Baldwin, Donaldson, Wix come to mind. NAPA may have crosses.
Worst case, figure out from old filter (unless it's a truly weird critter) what it's thread configuration is and physical size and track down something that has the same fit and function. You may have to try a big hydraulic shop the first time and then revert to crossing 'that' number later at parts houses.
If you have no part number cross reference source you can--with a little diligence--find a suitable replacment.
