I found a screen accurate Shoretrooper chin cup. You will have to replace the strap but the holes are correct unlike most of them you see for sale. It is made by JSP a UK safety Equipment Manufacture. I bought mine here: https://www.hivissupply.com/jsp-281-cs-2-two-point-chin-strap.html for $4.55 (Note $2.80 price is just strap)