Don,
I don't think this is exactly what Paul is using, but they're all pretty much the same thing. I had actually tried using the bands with my setup and could never get them to really hold tight enough. Also, aside from the Moss units, I've never been able to find them to go under 2", but again I'm not sure what Brosky is using.
I ended up using a "v-band" clamp from Burns Stainless which is vastly superior to the band clamps in holding power. The only drawback is they have to be welded on.