I ordered my supplies from Ponte Vedra Soap . They have all natural pre-mixed bases for a variety of cosmetics including glycerin soaps and lip balm. They also sell additional items to mix into these including colors, scents, and flavors (for the lip balm).
I am using 3 of their melt and pour glycerin soap base - Crystal Clear, Goat Milk, and Shaving. I am also using their Fragrance Oils but I think next time I will look into using essential oils. The synthetics smell great and are the right price, but the essential oils just give the final product a certain depth.
For the lip balm, I bought their kit and a few extra flavor oils. Note that their kit does not come with vitamin E oil. Vitamin E is used as a preservative to keep your lip balm from going rancid. Most drug stores carry it, so it's no biggie.