This piece is probably going to be obsolete. It's so hard finding parts that are over 10 years old, unless it is like an engine piece from an engine still being used today. Trying to find hull pieces for certain skis will be hard.
Go to ebay and look for "great lakes skipper". He has a re-sale shop. You can ask him. If he doesn't have one, he might can put you in touch with someone who does. I've dealt with him before, he has lots of the old stuff.:cheers: