If you are just doing touchups, you can mix it yourself from a few jars of auto touchup paint- only took me about 5 minutes to mix an exact match for the Celeste on my Campione D'Italia. You will need green, white and blue. If you want to respray the entire bike, find a good auto paint shop. They can mix to match, and even put it in a spray can for you. Or maybe you should let them paint the bare frame. They should be able to strip, prime, paint and clearcoat for you at a reasonable cost, they may even be able to heat dry it for you which will speed up the whole process. You can get new decals from Bianchi. The problem with getting the paint from them, besides the cost, is that about 5 years ago they made a slight change in the official color. Newer bikes have a little more blue in them. So, if I were to get some touchup paint from them, I would still have to "yellow" it up to match what is on my frame now.