Question:
Why is there no Insurgent counter for 1-0-8 Lt Arm III AAC?  (Not backprinted like the others either.)  Aranjuez could join the Insurgency.

Answer:
This was a deliberate choice made by the FWtBT designers.  The AAC unit was not a pre-Spanish Civil War unit, but instead was an ad-hoc unit assembled by the Loyalists in just a couple of days by pulling miscellaneous assets from other units and by arming a number of private vehicles quickly impressed into Loyalist service.  As such it was a unique unit that only the Loyalists should be able to form.

Source:
[AEG, Developer, 03-Mar-04]