There are a few places to get paints online I cant remember any off hand....but I will look around some.
One not though unless your buying Acrylics its really not worth it as the enamels are considered HAZMAT here in the US and can only be shipped via ground at an added shipping charge that most suppliers charge....notice I said most not all. I'll dig around in the Favorites some and try to get back here to post some links....
Also you didnt mention which brand paints your asking about or prefer....based on the prices you have listed Im assuming your asking about Testors/Model Masters...