I bought a 3 micron filter and base here,
Wix Fuel Filters - FleetFilter Online Store
The filter number is 33005.
And the base number is 24770.
For pre-filtering you could get a 2 micron sock filter from ebay.
I'm not sure of the current prices.
I'm not running on mo yet.
I've finally gotten all my hoses except for 50 ft of heater hose.
I don't have anywhere to do the pre-filtering so I'm setting up to do it on the fly.
I've got a 30 gal barrel (free from a car wash), converted an acme juicer into a centrifuge and then will do a final filtering through a sock filter.