tufcj Email this guy - roguesc1@icdc.com He makes them out of laser cut 10ga steel. 5/16 are $65/set, 3/8 are $75. Got this info from the AMC forum http://cgi.amcforum.net/cgi-bin/yabb/YaBB.pl?board=Vendors;action=display;num=1049126399 Bob tufcj