I believe that Behringer pack you linked to can be wired for single
phase use, albeit with lower capacity. This is a discontinued product - is there a particular reason you've chosen it (I assume price)?
There are other options out there as well which should be able to
wire in to your single-phase
system. Alternately, you can stick with a higher grade of
portable dimmers (such as
Leprecon ULD series) but you will need plenty of
power to your positions. Some do have two separate input pigtails requiring 20A each.
Know what you're getting, but don't be opposed to buying used.