Looking for a deep 3R pullbox that has a flange around it to be mounted half in/half out of a wall. New construction, have some conduits coming up out of the ground that need to get into a wall then travel up the wall. No room in the wall for 90s and the interior side of the wall won't be accessible. I'd use 4S box inside and an extender outside but its too small. Need something like 6" wide and 12" high.