FWIW, I ended up contacting Trijicon and they recommended https://www.mkmachining.com/. I ended up going with the ARD + caps because who wants a 4" sun shade on a 40mm scope? Had to email them to figure out what would work and we figured out the same caps/ARD that fit the Huron work for the...
Can't seem to find any 40mm options on the Trijicon website. Anyone find an aftermarket or other manufacturer shade that works well with the Credo 3-9x40? Seems like my VX-2 has different diameter threads.