T-Rex has the Fuel Tank Chameleon coming out relatively soon.

It looks promising spec-wise. Outputs are isolated, regulated, 300mA each, so you can use a "current doubler" cable to combine two into 600mA. The outlets switch between 9vdc and 12vdc (one switches between 9vdc and 18vdc).

I am suffering with the wall-wart on the ModFactor and then powering my TC Nova Drive and my 9v pedals from an ISO-5 at the moment. Will swap it out if the Chameleon comes out and manages to do the trick properly for me.