does anyone know the difference between the 2 separate part #'s listed for the FRONT SHOCK ABSORBER BUMP STOPS for a 1994 RS?

front:



52722-SE0-006 (16.3 rubber, bump stop)
52722-SM4-961 (16.8 rubber, rr. bump stopper)



rear:



52722-SR0-003 (16 rubber, rr. bump stopper (showa))




I'm trying to order replacements and I want to make sure I get the correct ones for the front. On the rear they only list one part number unlike the front...

Or if anyone knows any aftermarket (polyurethane possibly?) options I have for bump stops that would be great as well.