I've been buying sheet steel at Lowe's because it's convenient and (fairly) cheap. I went to get some aluminum diamond plate and it's (HOLY HOPE DIAMOND PLATE BATMAN!) very expensive. Like $15 ...

Cookware Brands GreenPan, GreenLife, Blue Diamond, Merten ... Click here for Bobby Flay by GreenPan Storefront Aluminum 8” Frypan. ... Stainless Steel 3.75QT Chef’s Pan & 12” Frypan ...