From the Office of Robots in cooperation with the Office of Scale Models
I found a great scratch builder of robots on twitter. He's based in Japan and goes by スエキチ(ケロッグ) or @surume0407. As far as I can tell he only posts on twitter. There's no website, gallery, or art account for his work, so you're stuck scrolling through his twitter feed to find all of his amazing works.
These are all cobbled together from other kits and some custon sculpted components he makes himself. Really incredible and inspiring.
More here: LINK
-Jake