You’ve probably already gotten the steel that you’re looking for, and if so then congrats! I don’t have many, but I have the Assassin, Vow, SS Koi, Bowl 303, and I which more manufacturers made steel versions of their yoyos.
If by any chance you’re still looking, nobody was interested in my Raw Silver Vow when I previously tried to sell it on the BST and it’s still available. It’s been a while since I bought it, but if I had the chance to do it again I would have gotten the Rose Gold or the Polished Silver version. The Raw Silver is still nice, but after seeing the Bowl 303 I’m now totally spoiled by all the shininess!