I suggest going through the Williams parts catalogs on the PPS website to find the part number. Then I’d take these steps:
1. Search Marcos site by part number
2. Check Pinball Resource website. If it’s not listed call shin as not every part is listed. He’s bought out a lot of operators over the years so he has a lot of one of parts in stock.
3. Check pps website searching by part number. They may have it in stock, but it’s not tied to Sorcerer so it doesn’t appear in their site under Sorcerer.
Pm me if these leads don’t work out.