I think you will find that it was the Staghounds that were fitted with Crusader 6 pounder turrets. The Danes used them post war.
The AEC had it's own 6 pounder turret and that ended up being fitted to rebuilt Staghounds post war in Sudan and Lebanon. In the Lebanese case with ROF 75mm guns with ex Sherman 75mm guns and mantlets in the Sudanese case. I believe that AEC still had the turrets to sell but had moved the chassis production facilities to civilian lorries post war so put surplus Staghounds under them with whatever guns they could acquire cheaply.