A few folks have asked for KiCad files for the i2c version. I was hoping to be able to make these at home and put them up on Tindie but I don't have the time at this point.
You can find the files on my github page: https://github.com/AnthonyDiGirolamo/i2c-thumb-keyboard
Hopefully y'all will find this useful! If you make anything with it please let me know! I would love to see anything you come up with.