I am going to be selling the OFT tether off the wife's PRO. $60 shipped, comes with spare tether and all mounting hardware. Only seen two rides.
http://oftracing.com/OnlineStore15/index.php?main_page=product_info&cPath=45_75&products_id=142 for picture
http://oftracing.com/OnlineStore15/index.php?main_page=product_info&cPath=45_75&products_id=142 for picture