Kids' boots--to borrow or buy

Hi neighbors— I have two granddaughters coming from South Carolina for a week. We will be heading up to NY state where they already have 20” of snow. Since these girls rarely see snow, I’m looking for some snow boots to buy or perhaps borrow Sizes 3 and 5. Does anyone have some gathering dust you wouldn’t mind parting with? I’m trying to avoid buying new for such a short-term need. Also interested in snow pants—sizes 10/12 and 8. These girls are not fussy so boy stuff probably works, especially for a temporary fix. Thanks Elisabeth