I don't currently have a picture, but I just made a "rack" out of a 2x4 and some conduit.
I just cut the conduit into equal sections (about 6" to 10" depending on how long you want it) and I drilled the appropriately sized holes about 4" apart to stick the lengths of conduit in. I actually angled mine a little bit so that gravity would help keep them in place, and then I screwd the 2x4 horizontally onto the wall.
You can make the 2x4 as long as you want and drill for as many pieces of conduit "pegs" as you'd like to hang belts on.