Don't worry they are out there. At a club that i went to in Leeds last week (Leeds seventeen Restaurant) there was a lad there who can't have been more than 17-18. Top dancer, danced all night and looked the part. I am now 53, my daughter is 13 and she know's the words to loads of Northern tunes simply by me playing them, she is not forced and listens to other stuff on her ipod etc. She even said to me once "Why don't new records sound like this" and "Why do I like Northern Soul Dad?" my answer was "Why do you think you like Northern Soul?" and she replied "because they are real songs". So there ya go, the new generation of Soulies are waiting til they are old enough to go to the nights.
I remember when i used to go to the Casino, I said to someone there "They're getting younger" meaning the crowd, he replied "No, we're getting older mate" He was right, there are always a younger generation that will carry on the beloved music, how can it ever die? simple, it never will!