I picked up a Walbro inline pump online and it came with 3/8" barb fittings on both ends. Does anyone know where I can find 5/16" barb fittings for this pump? There not NPT threads on the pump. It uses 10mm x 1.0 with a crush washer. Summit and Jeg's have AN fittings, but I can't find the barb fittings.