Here are some suppliers to the soap and lotion trade who we are familiar with. These may not be the least expensive places on the internet, however based on our experience, they offer excellent value and service:

Micas for coloring soap & lotions: TKB Trading Local to the Bay Area. Please contact us for our recommended products from TKB!
Soap Molds: Kiwi & Company Premium Birchwood Molds A large selection and great quality. So many sizes and options!
Soap Cutters: Bud’s Workshop Bud sells not only a log splitter, but also a variety of very well made and reasonably priced soap slicers.
Product Photography: Dagmar Kuta Photography Local to the Bay Area, very easy to work with, and reasonably priced.