.. Well at times my feet will slide forward and since I wear running shoes when I ride (at the moment) mainly for the breathability of the shoe my toe's gets squashed in the toe clips..
Back in the day

the other part of the scheme is a Slot texture in the sole of the shoes ... touring shoes, it has been molded into the sole rubber ..
leather sole shoes the slot cleat was nailed on.. that engaged the back of the pedal cage... This has allowed me to wear a looser fitting shoe, so the
circulation to my feet is better .. Slot does not have to fit tight I liked an hourglass like shape so angle is not locked in either .
Agree , the above product Ideas are OK... Welgo rebrands their pedals for big importer - sellers like Performance/Nashbar.
similar to Shimano's, but costs less, cleat slightly different .
Crank Bros & Time are also good MTB pedal systems for SPD type shoes .. Speedplay "frog" offers angular float..