-48VDC supply for home lab?

[Mark Leonard <mark () bernoullinetworks com>]

Greetings NANOG'ers!

I have a small home lab which I mostly use for learning and testing.  I'm
likely to receive some gear that needs negative 48VDC (ie: positive
ground).  Mains is a typical 120VAC, 60Hz.

Can anyone recommend a power supply, reasonably priced, to go from 120VAC
down to -48VDC@10Amps?  Something that fits in a two post rack would be
preferred, but not required.

Thanks,
Mark