BLICK & Local Art Stores
Look for the Lineco Brand (glue, board, bookcloth). Also a great source for endsheet and decorative papers.
Colophon Book Arts
One stop online or phone shopping for all of your bookbinding needs. Unwaxed linen thread in colors, marbling equipment. Formerly based in Washington and now in Indiana.
One stop online shopping for all of your bookbinding needs, online or in Michigan. Nice variety of smaller sizes.
I buy my binders board and PVA from them. Foil stamping machines and accessories, including capabilities for making dies. Based in New Jersey.
Talas One stop shopping for all of your bookbinding needs, online or in New York.
Northport Binding Co. My very favorite glue brushes (Anza) as well as bench weights.
Leather and parchment, based in New York.
Harmatan Leather for fine binding, based in England.
J Hewit & Sons Leather and Bookbinding Supplies, including leather dye, and 19th & 20th century reproduction endsheets that are great for miniature books! Based in Scotland.
Magnesium and brass dies for stamping with a kwikprint.
Genuine gold and imitation metal leaf for gold tooling. I buy it by the roll on a thin paper backing.
Rulers, pin vises, squares, high quality precision instruments.
Kelly Paper Great variety of sizes and brands including Mohawk. Can make custom orders and they have a great sale section if you visit a local store.
Limited Papers Online Source for text block papers
Direct from the source! My favorite text paper is Mohawk Superfine Softwhite Eggshell 80lb text.
Paper Source Parent sheets and smaller of lovely colors of text weight paper, decorative paper, and some bookbinding supplies.
Great places for press boards cut to size, decorative painting tools for paste papers, and bricks for weights.
Heat'n'Bond Lite for making bookcloth, silk thread for endband sewing, ribbon for bookmarks.
What can't you get on Amazon? This can be a test!
Do you know of a source that I'm missing? Please let me know, and I will add it to the list!