I'm not sure on sizing but the stem fits more modern forks IE ones that take 31.6 stems but the stem fits inside the steerer
Zipp Vuka Clip Bike Cycle Handlebar Riser Kit
Bike Cycle Steel Riser Handlebars 3 x 7 Shimano Shifters & Adjustable Stem
Profile Design Cycle Bicycle Bike Aerobar Bracker Riser Kit Spacer Black - 40 MM
SENQI City Bicycle MTB handlebar Comfortable Vintage Highway Fixed Gear Handlebar Aluminum Alloy Riser Bar 31.8mm
PRO LT Handlebar, Alloy, Riser, 31.8mm
31.8MM Mountain lebar Aluminum Alloy Riser Handlebar 30MM Rise 780MM Wide Bar with Paint Matte
