One of the coolest things in my eyes about being addicted to kitchen knives is customizing your favorites with something more eye catching than plain factory handles. Here are some links for places where you can score your own wood for DIY rehandles or for your next custom or professional job. Or if you are like Stefan, you can just buy it and hoard it for years and years! It's completely up to you.
Alpha Knife Supply AKS has natural and stabilized wood, and stabilizes wood as well.
Knife & Gun K&G is one of the larger wood stabilizers, and sells just about anything related to knife making.
Texas Knifemaker's Supply Sells wood and many other knife making supplies.
Jantz Supply Another one-stop-shop. Handle material and other knife making supplies.
USA Knife Maker Wood, Metal, Abrasives, Blanks and more.
Amazon Exotic Hardwoods Large specie selection and blanks for many different applications. Can't always see the exact piece you are buying however.
Logs to Lumber Exotics Blocks, Scales, and larger pieces for other applications.
House of Burl Burls and other species. Blanks, Blocks, Scales and more.
Burl Source Also known as It's a Burl. I have bought 2 great pieces from them so far. Good pictures of the exact pieces and uses respected stabilizers.
Wood Stabilizing Specialists, International Usually referred to as WSSI. Another well respected stabilizer and seller of stabilized blocks and scales.
Canadian Knife Maker Supply Supplies for our friends up north, eh?
Craig Stevens Studio Notoriously bad spelling Craig Stevens is from Alaska and sells some of the most unique and sought after pieces you have ever seen. Let the bidding war begin!
Ankrom Exotics Stabilized woods and some really cool pieces made from cactus filled with resin.
Arizona Ironwood More than just Ironwood, some really cool dyed scales and blocks as well.
AJH-Knives Resource Links Tons and tons of links to material information and sellers with that late 90's HTML retro charm we all miss so much.
The Fish n Poi Rehandle Thread The original. If you need inspiration, you will find it here.
Western Rehandle Walk-Through KKF User Kalaeb's rehandle thread.
If you are new to this, and would like a pro to work on your knives, then seek out Marko, Stefan, or Dave Martell for kickass handles. They all have subforums showcasing their work.
If you guys have anymore, let me know and I will add them to the list!