in the pages 2-3 of the instructions manual (2nd edition ) there's the instructions how.
for 10$ (in 1986 dollars now it should around 20 ImHO) you could have a set of 299 pieces. Just the units no AA,IC or plastic chips. They said nothing about the control markers... but i think that's include just the platics units. I don't know if it will be working but you should give it a try.
Write first sending money after
Gamemaster Consumer Sales
Milton Bradley Company
433 shaker road
Est Longmeadow, MA 01028
Hey if it's work, give us news about it and your projetcs
P.S. allow 4-6 weeks for delivery. Check or money order only