iBike Pro - mounting on aerobars

Got an iBike Pro for Christmas and have read through the instructions, etc. They recommend using the Topeak Bar Xtender to successfully mount the device on aerobars. I can’t find this device in stock anywhere online nor in the local bike shops. Anyone know where I can get one or other solutions?

http://www.topeak.com/2006/products/barxtnder/barxtndmain.php

Not sure about the Topeak extender but your lbs should be able to order you something similar to it. There are a few products that look the same as the Topeak in the QBP catalog (bike shop supplier).