Wanted: Malkoff MDC 3.4-6V head MDC 5700K cool white

[etc]

I am looking for a Malkoff MDC 3.4-6V head in Cool White (5700K)

Have a Malkoff MDC 3.4-6V head Neutral white 4000K 80CRI in mint condition to trade for the above.

CONUS only.