I use Thompson enamel. They have the biggest variety in color and quantities. They also have all the tools you may want to get or copy for you particular kind of enameling.

Charles 

Hallo Bath,

Next Thompson www.thompsonenamel.com is Schlaifers Enamell Supply http://www.enameling.com/Home.html a good address, especially if you also want to work with lead bearing enamels.
I think Enamel Colors buying is the problem of all enamel enthusiasts. Also if you have 100 different colors you miss in the current work, color Nr. 101.

Edmund

Thanks! That looks like a great site!

As someone new to enameling, I am wondering who your favorite supplier is and why......
I need to order some basics plus more colors. I am afraid I will always be lured into buying more colors! Thanks!