Two sheets of color-coded, paired "A-B-C..." counters that can be printed and dtp-mounted, plus a printable off-map storage card.
Usage: Replace, e.g., a stack of French units on the map with one of the blue French "A" markers and put the other one on the card along with the units. Print-off two (or more) copies of the storage card - one for CP, one for Allies.