I bought a UWS (United Welding Service) aluminum toolbox for my 1998 T100 SR5 extended cab. It fits like a glove, holds everything I want it to hold, and looks great. They are out of Florida, I love the logo, a jumping sailfish, now on a truck in the middle of Kansas. The cost was $200, their website is http://www.uwsta.com/special_orders.html, check out the "Blue Series". They were very pleasant to deal with.