I believe this stand was originally packaged with the “Go:Keys” but is now an optional extra. At over £20 plus delivery, for what is just a piece of black plastic, it’s a bit steep and should really be included with the instrument, perhaps along with a dust cover.
Having said that, it’s fits OK and is fairly robust - it happily supports my IPad and tutorial books.
Delivery to the UK was problematic, as the product was caught up in post Brexit customs issues in Germany, resulting in 2 weeks delay, check the current situation before ordering,