Interesting,
You might find inspiration at the House Rules section - look for Axis & Allies Global 1940 House Rules Expansion.
In this Expansion the Cost Of All Units section gives you a quick view of the number of units as well as their combat factor etc.
You’ll find it under The Captain’s Global 1940 House Rules Collection (sticked at the frontpage of the House Rules section).
You also might find inspiration at the Global 1943 House Rules Expansion.
Good luck:+1: