Trunk weatherstripping replacing

So I've been trying to plug up all of the trunk vulnerabilities that I've read about but I still have a small amount of water leaking in at the exact same spot on both sides of the trunk. I'm led to believe if I remove the weatherstripping I'll find the hairline crack and this time, finally, I'll find the source of the leak. I've covered all the other spots with silicone; the corner weld joint, the joint around the trunk openers, and more. Things have improved but I want to stop this leak forever!
My question is have any of you ever replaced the weatherstripping and if so what did you use to re-glue it in place. Or do you think I can use the same weatherstripping when I'm done sealing the joint? I've watched some youtube vids of people doing the same operation on other makes of cars but was just wondering if there's anything about our beloved gen. 2 Prius I should know. Also any good aftermarket replacements for the weatherstripping? The OEM's seem to be around a hundred bucks, which I'll pay if I have to, but would rather find something cheaper. Thanks fellow Prius nerds, I couldn't do this stuff without you!

 

From what I hear there's often a hairline crack under the weather stripping that is the usual culprit for a lot of leakage so I don't know if I need to get in and seal that crack, of if there's something wrong with the stripping itself that's allowing water to get in there in the first place. I had put a bead of silicone all around the edge of it but that didn't help either so I just want to take if off while my car is half way disassembled waiting for the new battery. I've cleaned out the cooling fan, cleaned all the surfaces, the upholstery, trying to take care of the leaks while I'm in there.

 

That's great! Can't wait to rip that rubber off and plug it up. It'll be a 100.00 well spent if I can keep my stuff dry.