DOES ANYONE KNOW WHO MAKES GRUMMAN PONTOON BOATS AND IF THEY ARE STILL IN BUISNESS. I HAVE A 1994 GRUMMAN 20 FOOT PONTOON BOAT. I HAVE HAD IT IN SALT WATER 4 TIMES THE REST OF THE TIME IT HAS BEEN USED IN FRESH WATER. THE BOAT HAS NOT BEEN IN THE WATER FOR TWO YEARS BECAUSE OF BACK TO BACK KNEE...