Hello. I'm not sure that BRNO is still making that exact action, but the one sold on the CZ large magnum rifles appears the same except for the longer shroud. You can probably find the ZKK 602 around if you look. By the way, while I cannot remember the maker, I did have my rifle fitted with a Winchester-type 3-position safety such that it works the "right" way. IF I run across anyone selling these actions, I'll post it here.
Best.