Slot gasket for cruisader

[chopper]

Hi all sailed my cruisader last night water was peeing in through the c/b slot I knew gasket was going but have been putting off replacing it.
Underneath it apears to be stuck on (not screwed on like the last one I changed 20 odd years ago) and some tape all around to tidy it up where can I buy all the stuff to do the job is there a kit or is it add lib.
 
regards Paul

[crap job (Guest)]

P&B, they will also provide instructions on the phone if you ask.  Follow them exactly or do it twice.
 
Measure width and length of what you have now before you call them, there are a couple of sizes.