Here are some resources we’ve found that we would like to share.
Dry Pigments – Zecchi’s Florence, Italy
Dry Pigments for Traditional Egg Tempera, Agate Burnishers and other Iconography-related specialty tools: http://www.zecchi.it/
Finished Icon Boards – Iconsboards.com, Romania
Beautifully finished linden wood icon boards, gessoed and ready to use: https://www.iconsboards.com/