In article .com, wrote:
the wires are probably in a metal conduit in a metal box. The box is
grounded. Put your new outlets on and run a wire to the box as the
ground, problem sovled.

Perhaps you should stick to giving advice on matters that you actually know
something about.

This ASSumption is *totally* unjustified by the facts presented, and it's
probably wrong. If the home was built within the last fifteen or twenty years,
there's a strong probability that the boxes are plastic, not metal. And it's
actually *very* rare in residential construction for wiring to be run inside
metal conduit.

That said, though... it was common practice, years ago, when wiring metal
boxes with Romex, to strip the grounding conductor back out of the cable
sheath, and terminate it to one of the clamp screws on the *outside* of the
box. No grounding wire would be visible inside the box, and yet the box was
grounded.

Bottom line: don't ASSume when dealing with electricity. FIND OUT.