I don't think Victorinox makes a horizontal carry sheath other than the swivel sheath. For that you'd probably have to look into custom sheaths. I'd suggest Esteban for leather or Eric at On Scene Tactical for kydex. As much as I love Esteban's work, I'd suggest the kydex for horizontal carry as I am always concerned about losing the tool, even with vertical carry. I've been lucky so far, but the amount I get in and out of my work truck I have dropped a few tools after the snaps or velcro have gotten caught and been pulled open.
Def