First thing I ordered for personalising my car finally arrived. Micra valve stem caps from aliexpress, only like $3 including shipping. It's small but I like seeing it when I walk to the car, plus the blue is a pretty close match to the color of my car.
They had black, grey, red, green, blue and purple. Here is the link in case anyone was interested https://www.aliexpress.com/item/4000...archweb201603_ This was the cheapest one, but if the link dies for future readers there were lots of different shops selling it.
They also had the same style but with Nissan labelled ones https://www.aliexpress.com/item/4001...archweb201603_ and Nismo ones https://www.aliexpress.com/item/4000...archweb201603_