I agree with Sky, you need to address the behavior issue that is causing him to get so far into your space that he is stepping on your toes often enough to make you think you need steel toes.
One other thing to think about, the steel in steel toed boots isn't really that
thick and it is still possible to bend it. I've known a couple of people who were wearing steel toes and when they dropped something on their foot that weighed only a few hundred pounds, it bent the steel down into their toes and they could not remove the boot. They had to call the EMTs and have the boot cut off.