Update! Squash Grommet anyone...?
Just found another Wilson NTourTwo 105 OS (Top Bumper Only)
I also have a Harrow grommet that is clear and looks to be for a 16x19. Unfortunately I have not played enough squash to know what this might be for.
Dunlop (probably 90sq in) has been included in a purchase to be 'piece-mealed' into a grommet set for another racket.