ofra haza's toothpaste tube

I have the OG HK sub in my car, late model. 2002. I have two ways to go: - 1) Pull part and glue it back. The edge has come away cleanly and can be resealed, but I know this is only a temporary fix... - 2) Buy the Kicker replacement, but I've not seen a very good how-to on this and don't...