Mountain Bike Self-locking Pedal Lock Pedal To Flat Pedal Adapters Suitable For Platform Adapters - Bicycle Pedal - AliExpress
Amazon.com : Thinvik Clipless Pedal Adapter for Shimano SPD Pedal - Clip Pedal Convert to Universal Platform Pedal - (Only Work on MTB Bike Pedal : Sports & Outdoors
SPD Cleat Flat Pedal Adapters with Reflector PD22 Self Locking Flat Plate Conversion for M520 M540 M780 M515 - AliExpress
Review: Every cyclist should have Pocket Pedals' slip-on platform pedals - Bikerumor
Universal Cycles -- Shimano SM-PD22 SPD Platform and Reflector Set [Y41R98070]