Recently picked up a Summit 450, not a E, not a S, just a 450. Weber keeps asking for a serial #, for the life of me, I cant find a serial # or model # on this thing. Webers parts breakdown does NOT list part #s. I know its a Summit 450. Does anyone have the part # for a LP hose and regulator ? The short one that hangs the tank off the side of the grill. Thanks much.