There's a couple of other threads about shielding turkey fryers. Cake O Maple linked to her pics in this thread

http://mapletrader.com/community/sho...553#post217553

You probably don't need expensive firebricks. Regular bricks or cinder blocks should work just as well. Just leave some gaps for airflow to support the flames. The foil will probably work, too. It doubt that if used as a shield as you're doing that it will get hot enough to melt or vaporize.