No need to over think it. Clean the area and let it dry. Then just put some jb on a small piece of sheet metal and stick it on. I don't see how it would fall off but you could use some duct tape to hold in place until it drys. Make sure it is dry before you put fuel in the tank.

Allen Here's a novel idea, let's not throw a bunch of parts at the car hoping it will fix the problem and instead spend a little time diagnosing it first. Life was a little easier when I was just a wrench.