Motion Sensor Needs Neutral, but none in box
I'm trying install a motion sensing switch in a 3-way configuration. I'm just replacing an existing switch, so the wiring is straightforward. However, the new switch requires a connection to a neutral wire, but there isn't a neutral wire in the box. Just a load, two travelers, and a ground. I don't know how the box was originally wired, but sometimes electricians take shortcuts to save on wire, and this appears to reveal one of those situations.
So, what options do I have? Can I connect the neutral wire on the new switch to the ground wire? There is an outlet (that is wired on a different circuit) nearby. Can I wire into that neutral wire? I don't like either of those options, but they appear to be my only ones, short of taking the three-way configuration down to a single-pole or just giving up on this altogether.
I appreciate any advice, but I respectfully ask that only those who truly know attempt to respond to this.