Aluminum Alloy Quill To Ahead Bike Handlebar Stem Riser Adapter 22.2mm/20.8mm To 28.6mm 1 1/8 Inch Bicycle Accessories Black - Bicycle Stem - AliExpress
Alloy Ahead Adapter 02 25.4mm Silver.
Aktudy Quill to Ahead Bike Handlebar Stem Adapter 20.8mm to 28.6mm 1 1/8 inch - Walmart.com