I just bought a used Billygoat from a guy who didn't know what he had. Got it fot 100.00. Anyway, the bag ripped on the bottom from draging on the ground. I patched it but was wondering what new bags went for. Anybody know where I could pick one up on the cheap side. Also this unit has a port in the front for a hose. I looked up the hose kit but it sells for 120.00. (they dont sell bags). Anybody know how to rig one. It looks like about a 4" opening in the port. If you use the port, do you need to put a plate over the vacuum opening?