I used to have that same CO2 mount in my racecar until they made change it to a full ring.... crazy to see! haha i'm glad I changed it now because if something were to ever happen, it could possibly slip out and I wouldn't want to get hit by that thing....
Ya picked it up a on amazon, and your post makes sense - this was hard to find. I hate seeing the cylinders sitting on the floor, and this was the only cool looking mount i could find. I wanted to get a blue powder coated CO2 cylinder too , but i was unable to source one.