Believe civil made his own version out of an old conveyor belt, perhaps somebody could find the relevant pic and re-post. Ain't got time meself right now, off out on the piss
People laugh at these things, but IMHO they are one of the best bits of kit you can stick on your bike. Make your feet a bit hot in summer but worth their weight in gold during the winter. Keep your feet dry and a lot warmer. If I had to recommend a bit of kit for the GS, these are what I would choose. Does exactly what it says on the box.