Available as an assembled Pedal and as a DIY project.
This Pedal is currently available.
a 1590a sized box
Did you build something yourself? Is the pedal you're looking for not listed but in this size? Trying to see if something fits between all those other pedals? Here's the housing you're looking for! Or maybe not..
http://nl.mouser.com/ProductDetail/Hammond-Manufacturing/1590A/?qs=lxPAlgZqN%2Fx6Rw4O%2FIXFww%3D%3D