Amazon.com: Campagnolo Part Derailleurs Buzz-On Clamp Adapter, 32mm, Black : Everything Else
Bicycle Front Derailleur Braze on Clamp Band Adapter Aluminum Alloy 31.8/34.9mm High Quality Cycling Accessories|Bicycle Derailleur| - AliExpress
Bicycle Front Derailleur Braze-on Clamp Band Adapter Aluminum alloy 31.8/34.9mm - Walmart.com
Front Derailleur Clamp Adapter 28.6mm 29.6mm 31.8mm 34.9mm Braze On Degree For Java Minivelo Road Bike Folding Bike 2 Speed - Bicycle Derailleur - AliExpress
Derailer Clamp - for braze-on fronts – Rivendell Bicycle Works
Origin8 Braze-On Front Derailleur Adapter - Rubber Soul Bicycles
Cyclists' Choice Front Derailleur Braze-On Clamp Adapter // 1-1/8" (28.6) Black - Walmart.com