I got an adjustable chrome Summit fuel line, has a built in filter, and a gauge port. I'm not using it, I can hook you up with it el cheapo!
I don't have a gauge for it, but it's this guy here:
Fuel Line
Or are you talking about the little filler tube that runs between the bowls? If so, Holley makes a longer one for carbs that have secondary jets instead of the metering plate. Should be the exact same thing you have, only about 1/2" longer. If that's the case, you need one of these guys:
Transfer Tubes