I'd also like to know. I spent some time last might looking for anything that mounts to a 3-hole shoe.

I thought it might be fun to try cleats one more time, so I can remember how much fun it is to fall over sideways at a traffic light.

I am concerned that plastic cleats will be too thick and render the shoes less than walkable.

I have a pair of TA Anquetil cleats packed away somewhere. They are aluminum and are fairly thin/shallow.