Chain link fence?

http://www.walmart.com/ip/36575553?...50078151&wl4=&wl5=pla&wl6=84015062591&veh=sem

I would use this stuff, with PVC pipe as the posts. You can even use a 45 degree at the top and put barb wire on top. Use some silver spray paint and your done. I plan on stacking two so it's about 6' tall.

Thanks for the info. I went to the manufacturers website and they also make it in green, black, yellow and white.