First, are you sure it was discontinued and not simply out of stock everywhere (OK that's sorta the same thing). It's not unusual for runs t be limited based on market performance and ROI. The Carbon topside used specialty materials for the casing, and of course the somewhat more expensive YiHi board. They may have simply felt the exhausted their market and wanted to move on to producing other products. It may also not have sold quite as well as the original Topside Dual. You can keep looking. Even items that are discontinued can pop up for sale on smaller vendors or even the classifieds here.