Zecchi Florence): Of special interest are their sable brushes, sun-thickened oil and dry pigments.
Cornelissen (London): My favorite bristle brush suppliers.
New York Central (NYC): Good all-around supplier, I like their sketchbooks a lot (Kunst & Papier No. 1003 13).
Sinopia (San Francisco): Kremer supplier on the west coast (see below).
Kremer (Munich and NYC): Most of the good supplies in other shops come from here.
You save a lot buying from the Munich shop.
Da Kat Windmill (Holland, 30 mins from Amsterdam): Old windmill where they still grind pigments with wind power.
Great pigments for sale in the small shop in the back.
Dick Blick (Online): Good online supplier, the 'Silver' brushes are really nice to work with.