The Harley Benton power plant, available from Thomann, is a cheap version of the T-Rex Fuel Tank Chamaeleon.
Unlike the T-Rex the power plant's outputs are not isolated, so there can be some noise. In my case I had noise from exactly ONE pedal, my Boss RC-2 looper. All other pedals together on it did not cause any noise problems.
It is much cheaper than the T-Rex. Both have 12V outputs and both can fit standard kettle leads, so you can use it in the UK and continental Europe if you just get the fitting mains power cords.