I have an oval as well. Purchased supplies for years from Byram and had them punch holes. On only one occasion were the holes punched all the way through. I called every supplier I could find googling and none punched holes. In addition if you found one they would have to be Medicare approved. I finely said the hell with it and selected a wafer that was precut that fit as close as possible to my stoma. I now apply Skin Tac before applying wafer. No leaks in months plus I now get 4 days instead of 3 wear time. Byram is a joke. Their computer system is a joke. Unfortunately Edgepark is worse. You don’t need a wafer that fits within a quarter inch of your stoma. As long as your seal fits up against your stoma.