Help with a part

[pair of jacks]

I have a 2000 21 SeaCraft- there is a tackle box built into the front of the center console which is accessed by the backrest over the cooler folding down- here is the issue- the backrest closes by a screw that fits into a small plastic piece inside the tackle box and that plastic piece snapped today- does anyone know what that part is called and where you find a new one?