This is just my $.02, but rather than take a chance with a PS that you aren't sure about, just get one that you can trust.
Check these places out and see if they have what you are looking for.
(These guys can be a little more expensive, but they are very helpful)
(quite expensive, but really nice equipment)
We have used the Idec, Sola, and Acopian PS's regularly in our industrial applications, and all work very well.
Just a thought.