dependin on the quality of paint you want to use, you can got to kragen and get some duplicolor they only sell it by the qt iirc but they may be able to get it in a gal for you,
or... summit has there paint that isnt too expensive either,
but if your looking for a good quality paint your going to have to go to a paint shop and buy it, ive had good luck with dupont paint before but dont know where to get it around here,
either way its going to cost yea at least $150-$800 in paint primer and clear.
btw candy red is one of the most expensive colors and black is the hardest color to paint and get good results