Thank you David! - they do not have this item.
James Larson (9/6/12) said BOM - N1080-N1080-10A - fit - that he obtained from Ham Marine. However, I need the model # for the center hatch ...I've gone to Tartan with the requested info, no answer yet. Perhaps I just need some appropriate weatherstripping ? But these hatches are old and replacing seems to be the best course. (?)