Quoted from Zanado:Can someone help me identify a part number please; unfortunately thereās about 400 miles between my pin and me. Itās the upper most clear plastic on the left hand back corner. From memory the plastic was labeled 01. Looking through the manual, my imagination and memory isnāt good enough to work out the part number.
Best I can do for you is link you to the manual: https://marketing.jerseyjackpinball.com/gnr/GNR_Manual_May2021.pdf
Hope that helps you.