No, the earcups are not replaceable. The earcups on mine needed replacing. After about 10 minutes of trying to figure out how to take the old ones off, I rage ripped the old earcup off. It was glued to the headphones - not anymore.
Just to clarify further, there's no way to get new earcups on the headphones after I ripped the old ones off. These headphones are going in the garbage now.