I'm 5'8" with a 29" inseam and wanted to try a different riding position. I bought this from Amazon:
Wake Bike Stem Riser Bike Fork Stem Extender Bicycle Handlebar Raiser Head Up Adapter Suitable for Mountain Bike, Road Bike, MTB, BMX, Fixie (Aluminium Alloy, Adjustable, Black).
Feature:
Adjustable height: max 2.7 inch (0 - 70mm)
Fork stem diameter: 1-1/8 inch (standard)
Weight: 7oz
Material: Forged 6061 aluminium alloy
Originally I considered an adjustable but didn't need any forward move. Gotta report I'm very happy with this selection. It almost puts me straight upright. It's worth a try