Recently purchased a Sony receiver on ebay that has 3 Toslink inputs. The unit is checking out perfectly (thank goodness!) except that the "door" on one of the Toslink jacks is missing. The jack still works, but the cable is not tight in the jack and falls out pretty easily because of the missing door. Has anyone made this repair? What is involved? Can a new door simply be snapped in? That kind of looks like the case, but I'm not sure. Where would I get another one? In addition to the 3 Toslink inputs, there is also a Toslink output which I don't need. Would it be possible to remove the door from the input jack and use it to replace the missing one?