I have learned a lot of valuable information from these forum pages - the most recent being that I can download Porsche parts catalogs (referred to as "PET" in forum threads) by model and year range (eg. 911 1974-77). I just went to Porsche.com, from Menu select Services, then select Classic Services & Parts. Scroll down the page to "-Genuine Parts" then select "Porsche Genuine Parts Catalogues". From Choose Catalogue select the model and year range, then press the "Display" button and boom your pdf format catalog opens. Thank you PP forum members!
Replaced the deck lid seal while I wait for engine and transmission parts (really easy).
Removal:
Clean up area under the seal:
New seal installed: