Hi all - I have a 1977 55HP Seahorse (Commercial, I was told - what makes it so?) with electric start that now has a busted cowling because the top plate broke off while I was using a liftbar to raise the engine. How can I best track down one that will fit? I understand many cowlings were interchangable - is there a cross reference anywhere? Can't raise this engine myself in a bobbing boat...thanks for any help!