Well, i'll say sum when i got to them lol

Dual or asymetric set (like neon pauldrons)
Retexturable kind of mask item (using neck joint)
Some kind of boots (like these https://assets.timberland.eu/images/...en-in-Grey.png)
Idk if is possible, but another body part hair items (like this but on tríceps https://m.media-amazon.com/images/I/...1000_QL80_.jpg)
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Also don't know if possible, but items with switchable body part [there are some masks and glasses you can't wear with hats (hazard masks, nerd glasses, etc) switch between neck and head bodypart]