Pretty doubtful unless you can score a clone. A breeder was working on a close to pure g13 seed line back in the c-world days but I can't remember how those worked out. Maybe someone here can refresh my memory as to his name.
Not sure if Reeferman used the Pacific cut or the airborne cut but I think it was the Airborne cut. You might be able to isolate a pheno from his Nutcruncher or his G13 release but neither of those is actually pure.
Good luck man.