Well, I have found what I believe is a good combination to make some durable, flexible and nice toe spikes. My aluminium toe spikes were always falling off whenever I had to climb stairs or walk on uneven terrain... eventually I lost 2 spikes and decided that I was gonna make my own. Made a mold from a part I have found and cast this with silicon. Here is the result painted (not yet weathered). My spikes are installed on a strip of aluminium.
Let me know what you guys think!