I found them by mistake when I was looking for info on my 8-inch Jabsco spot light. I was quite amused when I saw them. They had everything available to rebuild or replace your light though.
Mainship 30 Pilot II since 2015. GB-42 1986-2015. Former Unlimited Tonnage Master
The reflector in question is 9 inches in diameter. I found 10-, 12-, and 14-inch reflectors at Fisheries Supply for Perko lights starting at 470 buckaroos. Chroming starts to sound like an option.