I use the Hornady Rapid vehicle safe, it’s really nice and I think it you removed one side of the foam you could easily fit a holstered gun in there. I keep a P320 compact with a spare mag in mine with no issues closing the door.
I'm late to show, but yea, molle (molly) is your friend, if you like utility lol. Personally I use a hornady rapid safe for vehicle. Not quite as fast for draw, but on the rare occasion I go some place I can't carry, I know its secure from smash n grabs, also some states I travel through are real picky about it being locked up while driving.
https://smile.amazon.com/gp/product/B07754NPVZ/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1