Vegan Steel-Toed Boots?

I am going to do an archaeological dig in two weeks and they require having waterproof steel-toed boots. I am a vegan and really don't want to have to resort to purchasing leather goods, so I was wondering if anon knows of a good pair of men's, vegan, waterproof, steel-toed boots that I could buy? A link or name of a store that sells them would be appreciated. Thank you.