I bought the aluminum at Lowe's--in the roofing section. Comes in 10' rolls so I figure I can make a few more cowls for the 6 or 7 bucks I invested. Best part is that I was able to cut it neatly with some cheap scissors from Harbor Freight. If you have a wife that sews you could borrow her Fiskars to do the cut out. Be sure and put them back when you are finished Just a tip.

Cheers,

Ladd