Found lots of band clamps that go up to 5" and from 6" on up, none seem to cover 4-6". The 6" ones don't have enough little screw slots punched into them to get them down to 5". Specifically want to clamp 5" flex hose over rigid 5" sheet metal ducts. Anybody find a source that will clamp 5.5" or so and they aren't $3.50 each as I will need lots of them? I've checked Lowes, Home Depot, Oneida, McMaster Carr, Tractor Supply, etc. Randy