I love movies where aliens with fish heads and marble eyes are drowned into tarps. I mean, traps. For those who came in late, this happened in one of the Star Wars episodes, I can't remember which because I'm still laughing at the fish head alien. He was the one who said "It's a trap!". That's him in the picture. No, not the blue thing, the brown and white one. The blue is an example of what you can find at the tarps store that I'm going to mention next.
And no, you don't need to go out of space to find canvas tarps or poly tarps. Right here on Earth you can find all kinds for tarps at offline and online stores, some of them at very low prices if you search hard enough. The MyTarp.com website store has all types of tarps, truck tarps, flame retardant tarps, all of them or so it seems. And it ships them through UPS for fast delivery.
There are also some interesting items that I wasn't expecting to find there, but there they are: boat covers and gym floor covers. Great! And I have to mention the tarps accessories section. It has ropes, fasteners, hooks, you name it. It even sells scissors, imagine that!
So, may the Force be with you as you search for the custom made tarps you need, young
fish head alien master Jedi! And be careful not to fall into them. Traps, I mean.