In my rules supplement I’ve added this rule, and I am using the very same tokens for it.
IPCs can be converted to raw materials (represented by tokens from AA Battle of the Bulge). These tokens can be transported by transport, cargo plane, and/or mechanical infantry. Transports and cargo planes can carry up to 10 IPCs and mechanical infantry can carry up to 5. The raw materials can be moved to a team player as either a loan or gift (based on verbal agreement). These raw materials are produced at industrial complexes. Production of 3 raw materials at an industry only counts against 1 production cap. (E.g. A major industry could produce 30 raw materials in one turn) No IPCs can be “pirated,” they are destroyed along with the units carrying them with the exception of those that are carried over land. Mechanical infantry transporting raw materials cannot attack, but defend normally.