Any dodge full size truck 94-02 (old body) will work. The only difference i've ever seen was the inner fender well has a couple different holes pre-punched for various accessories, but nothing a small drill cant fix.
Here's a bad picture, but you can see where the sheet metal behind the headlight needs to be cut for installing sport light assemblies. All 94-01 1500 should be generally the same as 2500 and 3500 like Cozze said.