Why not just use the G Ford part ?

1316193
Pollen Filter Seal
Some Ford dealers say its been replaced by 'off the reel' alternative, but I've never had a problem getting it. It has to be 'closed cell' foam so water doesn't seep through.

Also, ensure the white long 'popper' fasteners are in good condition. As you replace the scuttle top look under the edge from the side to ensure they are locating properly. The fasteners can be bought separately (1106903),
but the part welded to the cover can only be replaced a couple of times before the cover (c/w fasteners) has to be replaced.