Some folks seem to have weird ideas about stainless guns for hunting. First time I've heard a brushed stainless finish referred to as "pimpy" but whatever. Any stainless gun can be bead blasted for a low glare finish, this will be the most economical. It could also be blackened with black hard chrome, black nickel, Black T, Duracoat, Aluma Hyde II, etc.
I don't think you can do a Melonite (what Glock calls Tennifer) on stainless steel but the process itself has nothing to do with the actual finish. It's a surface hardening treatment, like case hardening. Guns so-treated get their dark finish from black oxiding, not the treatment itself.