I'm guessing it would be simple to jerry-rig it by fixing a small piece of cloth, sponge or something over the vacant filter housing, which dangles in side the fuel tank, in the end of the neoprene fuel line. But obviously, it 's got to be something that won't dissolve in petrol or 50:1 mix. Would mic ro-fiber do it? Or a piece of household sponge? Anything else you can sugge st?