Gimbal can should able to do that, though I would avoid their series 10 beacons if you want the battery to last more than 2 weeks. Series 20s are a bit big (a little larger than wallet sized) and use standard AA batteries (4 each) instead of something exotic.
There's also http://kontakt.io/ but they require a more exotic battery. I'm not sure about production capacity though.
I've had the same experience with battery life on the series 10 beacons as you. Haven't tried the 20 yet. What're those like as far as general battery life goes?
There's also http://kontakt.io/ but they require a more exotic battery. I'm not sure about production capacity though.