Something you could do and get a larger selection is go on planet catfish, maybe look up the Lima if you want something in that size range and then click show same size cats, near, and so on. Then you will have a list of cats that only get around that size. Like this.. http://www.planetcatfish.com/catelog/sizes.php?min=378&max=462
Then if you want something smaller click the smaller numbered ones and search again. Just a thought
i look through the list and i like the trachycorystes im wondering if i get one how many more fish can go in with it cuz i dont want to over stock the tank