Oh man I don't know. Aquabid has some cories on there but they didn't have any C. duplicareus. Planet catfish has a forum that has a classified section but I don't know if anyone has those for sale. You could post that you want C. duplicareus on there and see what you get.
So you are the big time Cory person, well I'm trying to hunt down some C. duplicareus. coryRus.com just basically told me its luck if they get them, yet they are the easier to breed/raise version of the adofolai's. You have any insight on where I could get some?