Possible to fix my rockford p2 subwoofer?

i have 2 15" p2s, just over a month old. i have a quantum audio qc3500w amp pushing them. today i noticed that it didn't sound right so i checked and the left one was sounding really bad, right one is perfect. i took it out and the cone is disconnected from the top of the voice coil. voice coil and tinsel leads are in perfect condition. i searched around and there isn't a recone kit for this sub. is there a way i can fix this? can't i just glue the bottom of the cone back onto the top of the voice coil?