Looking thru the catalog supplement on the Fleetguard website, I came across a replacement cartridge for the Permacool kit sold by JC Whitney. Fleetguard P/N FS1204, listed as replacement for Permacool B1000, same size and thread, hopefully also 2 micron.

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Mitchell Oates
'87 MB 300D Diamond Blue Metallic
'87 MB 300D - R.I.P. 12/08
'05 Sport CRD Stone White
Provent CCV Filter/AT2525 Muffler
Stanadyne 30 u/Cat 2 u Fuel Filters
Fumoto Drain/Fleetguard LF3487 Oil filter
V6 Airbox/Amsoil EAA Air Filter
Suncoast TC/Shift Kit/Aux Cooler
Kennedy Lift Pump/Return Fuel Cooler