It's a funny size Tom, but there is usually no reason why you need to replace it.
Clean everything up and "bond" it in with a little silicone. Job done! (If that's the problem, anyway!)
_________________
Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
Check us out on Facebook! Please "like" our page!