Ompoks are offered sporadically and appear a specialty item. Perhaps going through reputable vendors, asking them if they can bring Ompoks in and when would be one way to go. Or keep checking vendors, Aquabid and Ebay. I've seen them on Ebay before.
I've contacted multiple online vendors and local stores and now its just a waiting game. I was hoping maybe you had a connection haha. I remember when I had them before we talked about them and you referred me to another catfish related site which was pretty awesome.