Tindie approved the store entry for the ten boards I built.  I also put together a kit with a gCorewith header pre-soldered (and weeBell_bluetooth preloaded) and mounting hardware.

You'll need a 18650 LiPo battery to fit in the 3D printed enclosure as well.  Adafruit has an battery with the correct JST cable already connected (you can also buy it from Digi-Key).  Or you could make your own by soldering or spot welding a JST cable assembly to an existing cell (I know people don't like to solder to battery terminals but I've never had a problem).  Just make sure the 2-pin JST PH connector has the Sparkfun/Adafruit polarity.