I'm too lazy to make good stiches that fit 4chan's file limits and only show the unused icons, so here's some lazy trash

Mount icons: https://o.uguu.se/jkMqcSum.jpg
Weapon skin icons: https://o.uguu.se/heRibgCx.jpg
A mess of face/hair/etc. icons (I have no idea if any are even currently unused): https://d.uguu.se/gUOtEROC.jpg