Warren, One version SJJP lists is aluminum, the other version he lists "more than 10 available". I don't believe either of those are a Byrd stick, which the OP has stated is what they are looking for.
The Cap is right. VST did many variations of finishes on RMK-14, 15 & 18's.
The VST (Vickers / Schoening / Tactical) Series was a Randall Made knife collaboration between Larry Vickers of Vickers Tactical and Rob Schoening of LHGK. The sole purpose of the VST Series was to provide asubdued Randall Made knife for the "guys on the ground".