Glamour, we already have a system for it, why not use it?
So when we try to change our hair cut we have a way to do it, we talk to the npc and jump into something similar to character creation menu.
Why not do the same with glamour items?
You buy a closet for your home/room/inroom, get it on a quest, what ever. Prob a quest, knowing Yp.
In your room you turn to it, open the doors and bang, a similar character creation menu.
There you can try every item you equipped, as long as it fits your class, it it does't the item will be grey in his box.
The boxes containing the items could be similar to the hairstyles, a small image showing the preview of the item.
You have to equip the item to add it on your personal database.
That's all, simple, clean option... wonder how much trouble compared with other options this would give.