looking to change the rear bumper of my Mk2 Sierra, the one on it doesn't look right with a Sapphire front end and Sapphire rubbing strips up the side. What is best to fit? Its a Mk2 5-door (non-XR model), a Saph rear will be too long but will an RS500 one fit/look right?

edited to add: Does a Saph bumper fit? It looks marginal from pics but i had a feeling it would be slightly too long