Thank you for this picture~! (I've been wanting some reference on these outfits.) And this one is official (I'm pretty sure), it's his second outfit from the second musical.
The first outfit from the same musical has been done a couple of times, I can't find any good pictures, but if you look it up on YT, I think it's part 6? Somewhere around there.
I feel like I was no help at all. >_<;;