VC1111, is this similiar to the system you are talking about?
I found this on the Bass Pro Shops web site...
In case the link doesn' t work it is the Ameristep Climber' s Continuous Safety System.
http://www.basspro-shops.com/servlet/catalog.TextId?hvarTextId=48228&hvarDept=400&hvarE vent=&hvarClassCode=6&hvarSubCode=5&hvarTarget=bro wse