I had it right the first time, but screwed it up when I decided to double check. I did a quick google search, and the first site I came up with (http://www.cccoe.net/genetics/codominant.html) has it backwards... so I lost faith in myself and did a switcheroo.
That being said... the term "co-dominant" is pretty much used interchangeably with incomplete dominance in ball pythons. Although, from a scientific standpoint that's clearly erroneous. Given that information, I can't think of a single "real" co-dominant mutation, except perhaps the het BEL's you spoke of. In reality, all of the "co-dominant" mutations are actually incomplete dominant.
But now curiosity has me, so I'm trying to think of a truly co-dominant ball python morph.