The prices do jump around quite a bit on this cable. Here is just one link to a lower cost 5p DIN to RCA. Not knowing anything about your table's arm I am reluctant to say what is the specific cable that you need. If it is a standard 5p female DIN then it should work.
This is one of two last mods I need to perform on one of my tables. I personally feel as though that this is not the area that I want to scrimp on.