Walmart offers Husky Plastic Drop Cloth, 0.7 Mil, 3-Pack for $3.88 +$5.99 shipping or free ship to store.  Shipping is free on orders over $35.

Product Description:

The Husky Drop Cloth is 0.7 Mil and comes in a 3-Pack. It is ideal for protecting floors, walls and ceilings during new construction or remodel projects. Use it to keep any area free from paint and dust. It measures 9' x 12' for optimal coverage. This painting drop cloth covers 108 sq. ft. It prevent seepage and allows for quick and easy cleanup after those projects are complete.