I couldnt find a direct link to fleet guard from a ng7172, but if it helps, the ACDelco part for that is PF2111. (i couldnt find any cross for fleet from that, either. Or from the Motorcraft part no.)
LF9001
Fleetguard filter number LF3339 is Motorcraft FL400S or WIX 51516
FleetGuard FF5135
fleetguard lf3941
Fleetguard FS19532
Fleetguard LF3925
Fleetguard AF26230 Vapormatic VPD7373
Fleetguard FF5147 is the same filter and costs around $5 to $7. Much cheaper than what Yanmar wants for them.
Cross reference hydro-gear filter number 52114
cross reference from a JD LVA12812 filter to ?
What is the cross reference number for a kubota diesel oil filter #16271-32090
On end of stock filter from dealer showed filter as a Fleetguard AF-25550, noted can get them for about five bucks cheaper. Also a Baldwin RS3715