1972 12 housing. The shop that cleaned and setup my diff lost my bumpstops and one of my shock mounts(since it only had 1 shockmount on it). Now i look at prices for these parts. Not cheap and have to be shipped. Im thinking of using poly bumpstops. Has anyone here used these and who makes a replacement part that doesnt cost a small fortune? thanks. PS I have 2 inch lowered springs. Bumpstops necessary?