Matthew Park wrote an answer about Black Diamond Ascension Nylon Split STS Climbing Skin on October 28, 2011
Also, you would have to trim them too much I think. Even though the board when its split makes 20 130cm waisted halves. the angle that the top of the skin would be at would make it not preform well because up at the top you would have to cut into the webbing on one side and that may make the ski fall apart more easily. I would just go for the regular STS skins for a split board. Thats what all my split boarder backcountry buddies use.