Is there any store that carries that plastic film stuff? It's kind of sticky on one side and it's basically the film that first comes over a cell phone screen to protect it from scratches but I don't want it that small. I need to spread it over something way bigger than a cell phone. But where can I buy it???
A Google search will get you a list of suppliers. But when there are any dog sled builders or mushing provide retailers speak to them. It is used to make sled beds and ingredients, and humans who make them may just comprehend the satisfactory nearby supplier, or as a minimum recognize excellent online offers.
Hardware stores sell large sheets of plastic to lay down over furniture for protection when painting. But these sheets aren't sticky like you are describing. Those plastic sheets don't have any adhesive on them. They stick because the very clean plastic sheets are applied to other pieces of very clean plastic. The closest you can get to this with a product from a local store would be plastic window covering that is applied to a wet window then the excess water is squeegied out. Look for a store that specializes in window treatments. Ask for tinted window plastic. Auto supply stores often have this in sizes for car windows. Unfortunately these products are a lot more expensive than the sheets sold for painting.