Didn't the prototypes either have a Hong Kong COO or were blank, it's amazing how many Rocket firing Fetts have turned up in old ladies attics.
Looks like a customised Taiwan job that someone paid £500 for.
They dissappeared when I logged in, but the screen was plastered in them before for all sorts of things, trading platforms, online advertising even Haven Holidays.
Pretty sure it's this one, posted this question on Rebelscum as well, and mentions that he has included a video in the listing on ebay.
https://www.ebay.com/itm/324617905606?hash=item4b94bc25c6:g:25EAAOSw33tgl~52
This one
https://starwarsforum.co.uk/viewtopic.php?f=1&t=41759
Not sure if it's out yet or how you would get one as the Kickstarter campaign has finished, I guess some will turn up for sale on the secondary market in time, didn't go for it myself but it did look impressive.
They are not common, but loose in variable condition they do crop on ebay fairly regularly, particularly Chewbacca and Darth Vader, here's a link explaining all.
https://www.imperialgunneryforum.com/t6330-glasslite-guide-discussion-thread#