I think that I know that Nismo LSD which previously belonged to Russ Swift.
If so, then it has only been used around 6 times for demonstrations and was as good as new, however it has been stored out the car for around the past 5 years.
He offered it to me around two months ago but I decided against the Nismo 2 way as it did not suit my purpose.
Did you get the axle stub shafts as well?
Alex