has anyone seen a stack of 12 or more identical 5v power supplies? like variable-output metal-chassis style, in the range of 50 to 250 watts? i thought there were a bunch of them at noisebridge but it's kindof far for me to go look. I need them for testing these 12-series LiFePo battery banks. i should mention that i will be using them at 3.6v not 5v, but i think 5v supplies are appropriate and i will be able to fudge them down to 3.6 or so. thank you -jake