To the OP:
How many vapers do you work with? Do you know them well? Do they know what a Provari is? If you work in a huge factory, that sucks, but if you work in a business where you can individually approach each vaper and tell them your Provari was stolen and if they know anything about it, please come forward. That's almost too much to hope for, honesty and such, but there might be a sliver of a chance. I work in a restaurant and all of us vapers are tight -- only one bottle of juice has been stolen from an employee in the past, but that was it... and the word was made known that if the thief was caught, s/he'd be in BIG trouble from ALL of us.
If you know these vapers, and hopefully maybe even hang out with them, drop by their apartment or outside work, and see who "all of a sudden" has a new Provari. Ask your fellow vapers to keep an eye out for someone vaping their "new Provari".
I once had my cash bag stolen (the bag I stuff all my cash payments into at the end of the night). Once I realized it was missing, the entire restaurant was looking for it. Well, before I could get to her, a girl found it and shouted out, "I found it! I found it!" I tried to sush her, but the word spread fast. My plan was to secretly find it, take everything out of it, replace it where the thief had hid it, sit back in my car in the parking lot after work, and wait to see who would come to claim it. Alas, that girl ruined that plan for me. But I was so ready to find that punk!!!!!
Do they know they'll now have to buy a charger for it?
EDIT: I think I'm going to take mine to that place in the mall and have my name etched into it. Classily, of course, but it'd be worth it.
EDIT 2: HOLY BLANK IT HAD TO HAVE BEEN THAT GIRL!