Power screwdriver adapter for combination handle tools?

[J Patrick Draine]

Dear List:
Somebody sells an adapter so that tools for the standard piano technicians'
combination tool handle will fit the hex shaft of a power screwdriver. I
recall that Jim Harvey spoke & wrote about making one himself, but I seem
to recall a semirecent advertisement for this adapter.
Anybody out there have the details (price, name, address)?
TIA,
Patrick Draine

PS This relates to the tendonitis thread, as well as the upright hammer
flange screws I'm removing this morning.