modified version of @filipturz model from thingiverse. Scaled up for wide jaw, widened and smoothed walls, added holes to that vents can be functional. If you'll scale it proportionally (all axis in by the same amount ) use vents.stl file to print the vents scaled by EXACTLY the same amount proportionally. If you'll adjust scale in each axis independently use vent_left.stl and vent_right.stl and scale them also by the same amount.