Punch shield foam, help?

I want to try and make a scottish targe so I have another lighter shield to use in addition to my bulky kite shield. I've been looking around and found a supplier I think is what I want. I'd like to order a sheet of polyethelene foam 2" thick by 24"x54". This is more than enough for what I want. I only want a 2' diameter round targe so there would be plenty left over for another shield and possibly a third. The cost plus shipping is $43.46 (not including tax). If a couple people want to help me split the cost, and get a nice sheet of foam out of it I'd be overjoyed. I'll even be willing to help whoever wants to help split cost make their punch shield. If split 2 ways it'd be $21.73, if three ways $14.49.

You can also make shields out of a roll of camp foam, though it may not be as big as you want. One roll for about 7$ can make a nice sized square punch. But if could, i'd help out with the cost cause it's good foam

I'd be up for something like this.

actually Crux that is wat i did, and it took 3 rolls of foam, it's 3" think lol

depending on how big you want it. it's 1/2" tihnk and the ones i've seen were 3 layers thick, so that size you'd only need two rolls, but they were medium punches.