The LiFePO4wered/18650 is now in production! Here's a video of the panels being built at Colorado Tech Shop:
Since I primarily designed it as a new base for the #LiFePO4wered/Pi, this combination is for sale now on Tindie as the LiFePO4wered/Pi3. It's not yet for sale as a LiFePO4 charge module on its own like the #LiFePO4wered/USB, but I plan to do so soon. The problem is mostly that the documentation is not yet done. :)
In the mean time, you can get it touch with me directly if you want to buy some for your projects.