I went through this same thing a few months ago, when I first got my universal player. It seemed that audio cables for this were ridiculously priced -- $100 to $150 and up. Some people on this forum told me that using two sets of component cables would be fine, as long as they had a nominal impedence of 75 Ohms. So I went out and bought two sets of Acoustic Research component cables ($20 each) and they work beautifully. Give 'em a try.
cheers,
supervij