I want to change tub and shawer faucets. The tub is one piece fiber glass there are two handle faucets. I want to change pressure balance faucets in two handle it is very high in price. I seen some crome plates which can cover the two holes but in my tub it is not going to fit. I all ready try. Is there any thing else some thing fiber glass cap or chrome to close the tqo holes. Please help me out thanks