New Shimano DURA-ACE Di2 Front Derailleur Clamp Band Adapter 28.6/31.8 Braze-On 689228746411 | eBay
Texas Cyclesport Shimano 31.8mm, 1 1/4" or 35mm, 1 3/8" Front Derailleur Clamp-on Adapter SH-ADP 29.99 New
FOURIERS Alloy Road Front Derailleur Clamp Adapter 31.8mm 34.9mm FD Clamp Braze on Direct Mount for XO X9 X7 Road Bike Bike|Bicycle Derailleur| - AliExpress
Shimano Clamp Band Adapters 28.6mm for Front Derailleur Mount Front Derailleur Accessories | Bike-Discount