Meta Branded theme and all categories header

Thanks Dan. The snip-it is from the discourse.org forum. It is the “Meta Branded” them. Just wondering 1) is the Meta Branded theme available as open source? (which I’m assuming from some older posts that it’s not. And 2) was wondering about the search widget/header that appears when you click the “All Categories” - if anyone happens to know if it’s available anywhere? Or if it’s custom? Thanks