I have 7 Defiant armoured cars and would like 2 more to complete a squadron, preferably from a KS set because those seem to be the only Defiants that had a crewman. It doesn't matter if a front axle is broken - they're easy repaired.
Wish I could help, only got one complete squadron myself - good luck. At least they can operate independently - you might have a look at my thread on mounting rockets on Definates sides - two independent of those would make sense. Now we got to get Conqueror should start looking at some armored cars once the new Tesla & Flivvers come out.