What can i use for a portable shooting surface?

I live right behind a tennis court, and I would like to take some hockey shots there with pucks and my ice hockey stick, but I don't want to wear down my blade on the concrete. I've looked for shooting tarps in stores, but they get really pricey. Is there anything else I can use in place of the shooting tarp which is sold in stores? Also, where could i get it from (I live in Toronto, Ontario)? Thanks.|||What the other guy said, or go to the hardware store and get some plastic plate. It won't be as slippery as ice or even synthetic/artificial ice though.|||Go to Home Depot and buy a 4x8 sheet of melamine. Cut it in half, when the first side wears out, use the other.|||Plexiglass