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I dug up the manufacturer information on that strainer a little while ago...it's posted here Mil Spec. Fuel Strainer for MEP-003a. However you may find the price is more than the strainer is worth.
If I were you I would just get some filter bases and put two commercially available spin on...
Napa 5108 o-ring gasket works great on the oil filter for my MEP-003a
Napa 3113 fuel filter comes with the correct o-ring gasket as well and to replace just the o-ring on the strainer bowl use napa 5131 o-ring gasket