Searching for caldwell 29 3 EO

have caldwell springs marked 29 3 EO
the metal portion measures 30 inches long is 1/2inch wide and 9/16 inches deep,,the plastic portion at the bottom measures exactly 1 inch, need two of these springs,also need 4 of the little white clips pictured.
Question are there any other parts I should purchase besides these two springs and 4 clips?