I am pretty sure it was phased out before the I17 came into being but I can't be sure. But the I17 definently is the the N5.2's modern version.

Sometimes as has been seen a spin package just doesn't fix things. Many times it kills a class that is already on it's way out.

ALso I believe the 5.2 doesn't have a class to race in other than a one design class or an open class. I don't think it quailifies for the F17 class which included the I17 and Hobie's FX1. But if you look it is really close to both those boats for single handing. If you look at the portsmouth numbers a turboed 5.2 with a new squaretop main and a spinnaker should be rated really close to both those boats. Can it be sailed to that? That is to be seen next summer!

Also, Performance still has the molds for the 5.2, and I would be willing to bet if you threw down enough money you could get one, but I think it would be better to find and old one in good shape.