Not pre-cut shapes, just pre-cut sizes like the 2x2 you are talking about. The production sheet comes in a three foot wide roll, 50 feet long. eBay vendors buy a roll and then sell cut peices as people order them.
di-noc is a 3M proprietary vinyl plastic wrap. Using a heat gun, it forms really well to bends and curves. The material will stretch and bond to the surface without crinkling or creasing. It is also very easy to correct if you mess up - just peel it off and a heat gun will make it return to it's original shape when it is not bonded to the surface.
Watch some youtube videos of di-noc installation. Just watching one of those will teach you a lot of what you need to do.
It's not meant to paint - try to find exactly the color and texture you want. If you did paint it, you might have to experiment with types of paint that will bond well to the vinyl. I've never seen painted wrap.