[R-390] Drop-in, GFCI-friendly line filters for R-390A's?

[Tim Shoppa]

Others here have talked about replacing the existing high-leakage-
current R-390A line filter with a GFCI-friendly IEC-plug style
power entry module.

If I wanted to be less ambitious and simply bolt in a regular
line filter unit, are there any that are a "perfect" fit in terms
of mounting holes and electrical connections?

Just looking in the catalogs I see a bunch of Qualtek, Schaffner, 
Schurter units.  Mostly one-stage, a few two-stage.
Non-medical units seem to have leakages
of under 1mA and the medical units seem to have
leakage currents of just a few microamps.  The number
to be under in terms of GFCI-friendly is 5mA, is that the
right ballpark?

Tim.