Where can I find those colors, I would like to have two pullets of each for "Loudmouth" maybe he would have too much to do than crow all day long. I feel sorry for him because his brother "Jock" will not share his hens.
It is a bit difficult to find the non-standard colors. I just googled, and this one hatchery says it sells the Exchequer color, of course not right now, but in the spring. http://www.californiahatchery.com/Exchequer-Leghorn-Chicken-_p_60.html
Other than that, you can order eggs from BYC or ebay, or try to find full grown hens at poultry shows or chicken swaps. For those, you would have to look around in your area and see what is available.
Good luck!