Realistic PZM mods

["Kim Cascone" anechoicmedia]

Last year I did some location recording using my stereo lavs taped to
walls and discovered the wonders of boundary miking
so I purchased two Realistic PZM microphones

I'm mulling over all the online documentation on mod'ing these mics
http://www.uneeda-audio.com/pzm/index.htm

but they all seem to boil down to
- converting the mic from unbalanced to balanced
- allowing P48 to power them
which is fine for studio applications but not idea for field recording

none of the mod's seem to optimize the quality for PIP based location
recording
i.e., utilizing the PIP to power the electret mics instead of having
an inline battery and Z matching xformer

so my question is:
- does anyone have information on how to mod these PZM's to use with
a PIP type recording rig?