Hi I have a 1990 120 l drive spent a lot of time and money getting this boat together and it finally hit the water this past Sunday. Well it ran pretty good I have to say until I pulled the back seat off and saw I was taking on water around the transom plate . I went online and saw that there is a seal there but can't find one seems like its obsolete. Is there another way to seal it or am I out of luck. And how do get to the seal from the top or from bottom. Thanks for anybody's help