I mentioned above that my friend found it at a yard sale recently.
Thanks to /u/tb21666, you can also find it here.
Being it was made in either 2016 or 2018 from the small date in the photo, shouldn't be too hard to dig up a source.
Odd such a new looking & 'mint' item would be found in a yard sale so soon after manufacturing, considering Amazon lists them being made available for sale as of April 4th, 2017..?