[time-nuts] Low noise power supplies?

[Richard (Rick) Karlquist]

I know this topic has been discussed in the past on the list, but
a colleague is asking if there are any off the shelf low
noise power supplies for testing oscillators.  Something
a cut above an HP "brick" lab power supply etc.  They are hoping
to avoid having to homebrew a power conditioning circuit.
Did we ever arrive at a concensus as to the state of the art
in homebrew power conditioning circuits?

Any help would be appreciated.

Rick Karlquist N6RK