Bing found the following results
Amazon.com: Flush Chains For Toilets
How To Adjust A Toilet Chain - Ace Hardware - YouTube
Fluidmaster Flapper Chain 5104 - The Home Depot
Toilet Flush Valve Chain for American Standard - The Home Depot
Fluidmaster 5104 Universal Kink Free Toilet Flapper Chain Replacement ...
Amazon.com: Toilet Chain
Toilet Lift Chain - The Home Depot
Toilet Repair Tips : How to Fix a Toilet Chain - YouTube
How to Fix a Toilet Chain (Step-by-Step Guide)
GUIDE: How to Fix a Broken Toilet Chain - Gabe's Guides