Optical TOSLINK to coaxial converter

M-Audio had a couple of Coax-to-Optical converters, the CO2 was bi-directiona, I think they had uni-directional versions too, but can't remember or find the model names. They worked flawlessly, and were very reasonably priced.
 
I've seen them on eBay at even more reasonable prices. None today, but usually around $50 or less.

FWIW I use the M-Audio DigiPatch to convert optical to copper and vica-versa, but I already had it in the rack. They show up used too, usually for around $100. But you get the ability to patch and distribute too...
 
Avoid the Cables-to-Go and Monoprice devices, they appear to be the same product, and I've tried a couple of them with limited success. Not worth the hassle!
 
(full disclosure - I worked for Midiman and M-audio way back when, so yeah, I'm biased, but I have no financial ties to today.)

Hmm thanks for the suggestions. I'm thinking that not a lot can go wrong as long as it does the basic job, and after all it's only going to be for occasionally checking mixes through the VRM box.