I found these on ebay and was wondering if these were any good. They only state they are made of a "Lightweight material." http://cgi.ebay.com/ebaymotors/SILVERADO-99-1500-2500-3500-std-Cab-Ext-SIDE-STEPS_W0QQitemZ8001785483QQcategoryZ33650QQssPageN ameZWDVWQQrdZ1QQcmdZViewItem
http://i12.ebayimg.com/02/i/02/b3/bc/c0_1_b.JPG