Sources for Game Material and Equipment for Building Prototypes
A: Betzold
CH: Betzold
D: Avery-Zweckform
D: Architekturbedarf
D: Betzold
D: Collect-it
D: Cutcraft
D: Creativ Discount
D: Farben Frikell
D: Hail Lehrmittel
D: Hobbyshop Rüther
D: Fachshop Laminieren & Binden
D: Mein Spiel
D: Modulor
D: Packplan
D: Proxxon
D: Q-Workshop
D: Reitberger
D: Spielmaterial.de (10% discount for SAZ members by.application through SAZ office)
D: Stoff-Schmie.de
D: Time Tex
D: YodaGames
F: Boehm - Tools of hollow punches for e.g. round counters
INT: CG Textures
UK: Board Game Extras
UK: Dice & Games
UK: Plastic for Games
USA: Caseys Wood
USA: Chessex
USA: Gameparts
USA: Intended Blanc Dice
USA: Litko Game Accessories
USA: MakerBot
USA: Mayday Games
USA: RolcoGames
USA: The Game Crafter
Pixabay - free images & royalty free (pay attention to Pixabay License)
Further links and hints on BoardGameGeek