www.sportbiketrackgear.com has good prices in general. I haven't found many places giving any significant discount on the PitBull stuff. When I got mine, I ordered directly from PitBull, as they had free shipping. Don't know if that's still the case.

I've never tried one of the forward handle rear stands, so I don't know if there's an advantage, other than it saves some space in the garage.