try Wix on line
Fram does not have a filter that will cross-over. Baldwin filters cross over for HHTA0-59900 would be a BT9358. I would recommend NOT using Fram filters on your Kubota. Use Kubota, Wix or Baldwin filters.
WIX makes all of NAPA's oil filters
Champion Filters (not connected with Champion Spark Plugs)
Champion
Purolator
hastings
The Kubota oil filter 15241-32099 crosses to a NAPA #1064 or a Wix # 51064. NAPA filters are made by Wix. Hence the similar numbers.
Champion
Champion Labs.
Made by Fram.
I have been searching on the net and found out that WIX makes the carquest oil filters. If you look at the carquest oil filter box it will say Wix Filtration.