SEEKING DATA CABLE FOR JENSEN RF10DC
Go to this link and click "find a manual";
It is not for your model exactly, is for a rf10ch, but look on page 12 it shows the standard cable for this sort of unit - it looks like a 15 ft standard din 8-pin (7/1/315) connector. The cable should be well shielded. With this information any electrical shop should be able to make one up.
or contact these guys - they have taken over customer service from jensen, but i am unsure how good they are - please post back if you have any feedback on this.
Hope this helps :)