Where to get colors like this?

Don't think such colors exist among Tamiya sprays:
I found some in sprays for polycarbonate/lexan R/C model bodys that's why I asked

Sky blue metallic

http://www1.odn.ne.jp/bimmers/minicars/mc117Z3007.jpg

Estoril Blue:

http://media7.motorcities.com/01EBN083120159A.jpeg

I am thinking actual auto paint. just a geuss

It is possible to spray models with RC paint, but it stays softer longer and needs more care!

Try any after market car places or the dealers who make/sell the car and ask them for the "touch up" cans