AC to DC Power Supplies

[bdfleming at kanren.net (Brad Fleming)]

Hello All,

I'm in the hunt for 3-4 AC to DC power supplies and was wondering if  
anyone has a brand / part they suggest.

Basically, we only have AC power in my building but need to stage and  
test devices that will live in DC-only environments. The devices being  
staged require -48VDC and a max of 420W.

Thanks for any suggestions!

-Brad Fleming