Unity now makes a dedicated streamlight switch..
Compatible with standard legacy HL-X, but it's not compatible with crane plugs. I believe Streamlight's proprietary plugs are a bit larger. It functions with crane plugs at some angles, but not consistently enough to feel reliable. Streamlight confirmed it's compatible with the TLR-1/2 remote switches, which means it should be dual-lead compatible if you're comfortable with Streamlight's remote switch quality.