We have tried to make contact, but not gotten through, so we believe they are out of business.
Altphotosource sell ready-to-use, Wet Plate Collodion Kits for both positive and negative images (Ambrotypes, Ferrotypes/Tintypes and Negatives for POP) and individual chemicals. Black glass, clear glass, tin and aluminium for making wet plates.
Utah, USA
Email: sales (at) altphotosource.com
Ship: Locally