IKEA Skadis - Plier holder - 2 or 4 pliers

Print the left and right hooks flat, angled edge up, and attach them with self tapping 3x12 tapered screws.

Pick the body of four or two plier variant. Or both if you want (but be sure to print hooks for each).

As the hooks are separate, you can easily print different shape hooks to work with your pegboard.