If you wan't a simple powersupply you can using a trafo, a bridge rectifier and a few condensators. You can use the following program:
http://www.arcobel.nl/~dabit/pelt_supply.zip
Just enter the Vmax, the Imax for yer pelt and the ripple you would like to have and the program tells you what components you have to use.
My original plan was to build a powersupply like this for powering my pelts, but i'm now planning to use a trafo with a home build switching power regulator

. I don't have the skills to design one, but DaBit (also the writer of the program above) is bussy designing one.