I know that this post is more than 10 years old (!), but I am still interested in getting a Toslink to ST interface (and a BNC to ST interface as well).
Since it becomes difficult (if not impossible) to find one of the devices mentionned above, why can't we get a schematic of a DIY solution ?
I have been searching the web for weeks, and I found no schematic: it should not be as complex as sending a man on Mars (!) Lol
Any help will be appreciated...