As Scott said Coastal Airbrush is your best bet for SMALL quanities. If your going to buy large quanities then go to the HOK website and do a dealer search in you area and they can hook you up.
I buy from Coastal, they are alittle more expensive but they have everything in small quanities...even Kameleons by the oz. ! Plus they special order, for example: I called last Thursday and asked for 4 oz. of PP-05 Prism Pearl Blue Paste. They said they no longer stocked it because of low demand. I said the customer picked a white base with PP-05 ghost flames...help me out. Coastal said no problem, they will have it Friday and ship it to me the same day(Fri.) with my Kameleon order. How can you beat service like that for 4oz of rotten paste. Plus they stock Automask
. The only bummer for me is I'm on the other side of the country and you can't ship paint by air without paying big money. But it only takes 5 business days by ground
Check out autobodysuplliy like ez said..they are cheaper but not as many small quanities available.
That place Welle Auto is not bad. (see HOK tech sheet post)
Cararts isn't bad either...
Check out coastal though...