I'm not sure if they carry them, but "neos overshoes" is what I wear at work in the winter. Several different levels of insulation and can be had either studless, or with "stabilicers" so they can be replaced when worn. I can personally attest the "navigator" model is warm, kept my feet warm to -40! If they do carry them, def go to them to be fitted (and wear/bring your boots), several co workers bought the wrong size from the internet.
Unknown. You can call them, and they will give you the correct information, as well as let you know if they have it in stock.
I think your looking for traction cleats but not 100% sure.
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