She's been showing this off for years but hasn't released it as a product or open sourced it or anything. I messaged her a couple years ago on IG and asked if I could buy one and I think her reply was something like it would be available when she's ready. I think someone will have to copy it for it to be available to the masses.
Link to Dani Clode's website https://www.daniclodedesign.com/thethirdthumb