I have seen another post with no positive outcome but... reaching out for help. No idea of make or model. 21 foot round above ground overlap liner. 15 I think cover plates covering metal top rail. Mine are 2 piece. Don't need exact. Just "will work". First pic inner/pool side. Second under top plate that screws into outer upright posts 2 screws. Inner has 1 screw. Any help appreciated. Any other info please ask. Or email [email protected]