Sweet, another Nc700 rider with a C50... (my 2007 C50 now has 100,000 miles on it, bought it new with 1 mile). To the OP, I have never seen a steering damper for sale for the Nc700.. Numerous riders modify their suspension but not by adding a steering damper... (rebuild forks and a different shock).I've gotten speed wobbles on my C50 but never my NC. The rear end is the unsettled bit in hot corners for me. Wallowing is probably a symptom of the rear suspension being... price oriented.
I haven't seen any of the guys who do track days rock a damper either