SOL models has three figures that can be used for rappeling (not really fast roping): a rappeling ranger and two SWAT officers.
The home page is www.solmodel.co.kr (type swat and cliff rappeling inthe search box).
If you take a look at my site (projects) you'll see that I'm working on a Blackhawk Down diorama; I'll probably modify the posture of a few Dragon figures to have them fast roping.