I couldn't find that at bLowes, Bean. I did find, however this Raco box (
http://www.myproship.com/index.aspx?...=1&sku=6228373) at Lowes. It is exactly 1.5" inches deep, on the outside, and it is gangable, if that is the correct term. A screw comes off the side and the side comes off. Multiple boxes can then be attached to eachother. You can put as many together as you would like. The plaster ears come off too to make a standard box. They're $1.98 each.
Sweet!