Thanks to the Internet, pipe makers around the world have access to great supplies from anywhere in the world. German Ebonite, Italian Lucite and exotic woods the world over. These are all suppliers I’ve used in the past and have been very happy with.
Lee Valley Tools: Tools and shop supplies
Mark Tinsky Briar, pipe kits and Pre-made stems
Michael Parks Italian Briar
of different grades
Pipe Maker's Emporium Rod Stock, Briar, and pipe making supplies.
Rodney Rice Exotic Woods: R & K Wood Sales Rare and Exotic Woods.
Romeo Briar Briar of different grades
Tim West at JH Lowe Delrin, bamboo, tools, and general pipe making supplies