The latest installment in the Universal Vault program, offered through Amazon, includes Man In The Shadow (1957), directed by Jack Arnold in black and white CinemaScope (a favorite combination). It’s a modern-day Western starring Jeff Chandler and Orson Welles, and it’s quite good.
Also available is Joel McCrea in The Virginian (1946). It’s not a 50 Western, but it’s got Joel McCrea in it. And that’s good enough for me.
May 2nd seems to be the release date.