I saw a solid gold outfit like this in Peakvox a couple of days ago. I didn't take a picture of it, but it seems to be the same outfit reskinned. I may be mistaken, however. Hmm...
Heavy Water Gold Knight maybe?
Ah, yes! That's probably it. Just found it on AZ4... says "no longer available". That's alwasys a bummer.
We still have the Heavy Water Gold Knights. There's a bundle in the Excluives store for $14.99 called The Ultimate Gold Knight Bundle.