There is someone on ebay making and selling gaskets for
the early motors. You might check with them.
https://www.ebay.com/itm/265693443001?hash=item3ddc9033b9:g:qJEAAOSwIqNigTPZ&amdata=enc%3AAQAIAAAA4K%2BzRBt1OMYYbDMuvanz3qc0NgOlnuOSYlb2zjoQhSKRJQsIv9XaCs2MuWTo3euvzFUR%2B%2Fcxed8zG3BFWwkVxbcZfWFHwziwhpxYYjP%2FgPvYCqhuvv2UGaNgx%2FK%2FsQWJdyAG%2FFlHxkjqzzjQUF1fHI5tG8EQ3rSFjVTa%2B3fji3x0Ob4rG%2BaxEIrufhvUOg3r4SzlTtxYlQGg6MAVSbz5nIdE8DNfdyoGfp%2F7UEyqASexz0YNzfxTv5%2FpN7HLY41PTpTq%2BGJJrlJeBBGGg4TqLIbCfEMo7tOul1iVDdxk7VJH%7Ctkp%3ABk9SR5bMwaD2Yg
Tubs.
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.