You can get computer power cords with
NEMA 6 plugs, which is the norm for 240v appliances. They're not common in residences in north america, but not that uncommon commercially.
You need to ask the electrician what kind of receptacle he is installing because there are different heads for 20AMP and 30AMP. You can buy power bars (PDUs) that have different heads too.
Thanks for the tips. I ended up getting a couple PDUs similar to what you linked. (one for the new cointerras and one for all the rest of my miners as well).
For anyone else in the U.S. who is contemplating adding 240V circuits to handle CoinTerra devices, I documented all of the details of what I bought and what asked the electrician to do here:
http://www.ewal.net/2014/02/10/electrical-prep-for-cointerra/