Haha, most of them have already been posted here already, however:

Recently I've been making a collection of references for all the mains, and there are several more that haven't been shown here.

afaik this should have all the unreleased clothing----> https://drive.google.com/open?id=1RWnCTlIqQlyTB19kCZhZ4oRkwNAnGSjL

Open the folder named "Official Artwork", then "Clothings". All the folders that have (name unknown) after it are unreleased clothings.

Hope it helps xD

Send links in pm to me please?

so they can be added :D