Not sure which guard you’re looking for, but a guy I follow on YouTube makes parts for Atlas mills, lathes, and shapers. His prices are really good in my opinion. Hillsgun is the YouTube channel and Atlasmachinshop.com is his store. I have bought a couple things from him and believe I got a super price. He does an eBay video every so often about Atlas items being sold and identifies if they’re overpriced. I‘d say he’s an underutilized resource for this arena.