I can't help you with that question but I have a pair of rubber hip boots with steel toes. I haven't worn them in MANY years, the last time I was caught between a Momma moose and her baby. It is REALY hard to run in those old boots. I should get them out and see if the rubber is even still flexible! That said I just had a thought, Ace Hardware or that type of store may be of some help.