Ahh! Found a perfect solution at Kragen Auto Supply in our lil' mountain town: $12, has a sensor on a long thin black cable, that you slap onto the exterior door frame (not the door itself, but the steel, painted body opening that houses the door) by the lower hinge. The gauge looks perfect, is mounted with simple mounting tape/velcro, and the cable is simply threaded under the door frame rubber molding and the rest hangs out of view behind the dash. Can hardly see the cable to it's simple, non-invasive, and works great, for $12. No pro installation required. I like that fact it is kept stock, ie, not modded.