I need needles for a 5420 Case IH Baler

Hi 

Newbie here! I am looking for a set of needles for a 5420 Case IH Baler part # 1337721C1 or a New Idea 551 part # 3732157M1 . I was told that the New Idea 551 was the sister of the the first, not sure that the needles are the same but I am trying to find needles in a haystack!! ACGO doesn't carry these, I didn't find a Case-IH dealer that has any either. I included a jpg that shows the part and part #. Thanks for looking...

I need needles for a 5420 Case IH Baler