Fuel filter for a briggs and stratton. help!?

i just got an old VERY mishandled gocart. it has a Briggs and stratton engine. and the carburetor is attached to the engine and the gas tank. it is strange. the fuel filter is on a straw. that hangs down into the gas tank. and i was wondering where i could get a new one. or if i could just get some fuel line and a fuel filter and just make a new one. and if it mattered either way.