You can purchase replacement tilt mechanisms (the gear systems inside the headrail that rotate slats) from specialized repair sites or major home improvement retailers.

: Specializes in wand and cord tilt mechanisms, including specific parts like the Graber/Bali/Nanik Hexagon Hole Tilter.

(UK-based): A great resource for those in the UK, carrying a wide range of universal and brand-specific tilters. Major Marketplaces & Retailers

: Offers a massive selection of tilters for mini, wood, faux wood, and vertical blinds. They are highly rated for their "Buying Guide" that helps you identify your specific mechanism.

These sites are ideal for finding specific brand-compatible parts (like , Levolor , or Graber ) and often provide repair guides.