The picoUPS, as suggested by Ormston, back at
THIS_POST has arrived.
They were back ordered on the unit he linked to. The seller had a substitute
HERE, same size, same functionality, same price.
Those guys ship fast!
The unit is about the size of two postage stamps.
It ships with cables, without instructions, but the manual and other goodies can be found
HERE.
The silk-screened lables on the board pretty much tell you what you need to know.
I was looking for a lightweight solution, this is it.
Thanks, Ormston!
-AC