PP Pedal Plate | SL | Adapter compatible with Shimano SPD-SL clipless pedals | Converts clipless into flat pedals | No cleats needed | Adding grip and comfort : Amazon.co.uk: Sports & Outdoors
Crankwork can make your SPDs into flats with its adaptors
Corki Universal Clipless Pedal Platform Adapters India | Ubuy
Review: Every cyclist should have Pocket Pedals' slip-on platform pedals - Bikerumor
Amazon.com: Thinvik Road Bike Clipless Pedal Convert to Flat Pedals,Universal Platform Pedal Adapters for Shimano SPD-SL System Pedal(Only Work on Shimano Road Bike Pedals) : Everything Else