Try radioshack, or yea like you mentioned, ebay will prob be the fallback. My Z-2300 came with a small black converter that has the 3 audio jacks on one side, and the red/white RCA jacks on the other.
Samsung PN60F5300 | Denon DBP-1611 | Roku 3
Denon AVR-1713 | EMP E55Ti | EMP E56Ci | EMP E5Bi | BIC F-12
Topping TP23 | NHT SuperZero 2.0 | Velodyne DEQ-8R