Wayfair offers the G-Floor Diamond Tread 24x10-foot Garage Flooring
with free shipping
. (Enter the square-footage you need to see this per-carton price; any number more than 240 will require that you purchase more cartons at this price.) That's $2.54 per square foot, $188 off list, and the lowest total price we could find. It can be rolled out and trimmed to size.