I'm going to get a lot of flack from this, but I've never been able to tell the difference between various Toslink cables, cheap or expensive, plastic or glass. (I also can't detect a difference between Toslink and coax, but that's a whole other discussion.)
My advice is to keep it the way it is if you're happy with the sound.
Michael
My advice is to keep it the way it is if you're happy with the sound.
Michael