Have now found a quick and easy one.
Extra overlays and synbols can be added but haven't needed them yet.
Have rattled off a set for the Teutanians and Strandians. My idea is to have bare flagstaffs and set the appropriate colour on for a battle. The troops used may vary but the colours will fight in the engagements their parent unit should. I will keep a diary for each unit.
I cut, glue, fold over, et voila.