Have just done this in the last couple of days ...........
The paint code on my VIN plate gives me Niagra Grey, the vehicle is actually Oslo Blue and is Oslo Blue everyhwere, so it hasn't had a colour change for sure.
LR Dealers will supply paint in a pack of 2 aerosols, for about £7 + vat, the cans only have a very small amount (150ml) of paint in though, I was painting 2 D2 facelift bumper end caps and there wasn't even enough paint in 1 can to give a basic dust coat over primer
I'd estimate each end cap would need 4 cans of paint to give a decent thickness of paint.
So ......... after a quick "google" I found that Halfords mix aerosol cans for you, while you wait, these cans have 350ml of paint in and definitely have a better spray nozzle that gives a better finish, the Halfords cans are £12.99 each (I bought 2).
They also large cans (600ml) of clear laquer to go over the top for around £6.
The Halfords paint gives a much better finish than any aerosol I've ever used over the last 30 years!!
Bumper ends caps now look better even before their final flat with 2000 grade wet and dry and a polish than they did when painted professionally when I did my facelift.
I can't believe I'm recommending Halfords products but on this occasion they saved the day, it was Saturday afternoon and LR Dealers had closed, but would have had to order the paint anyway.
But, check your paint code before you buy the paint, if I hadn't I'd have grey end caps on a blue vehicle!