Pop Pulse USB to S/PDIF and AES converter.
Will Ship To: Anywhere
This is a very straight-forward digital converter that takes any of an S/PDIF coax, optical or USB input and outputs any of BNC coax S/PDIF, AES, optical or IIS. Power is via USB or a wall-wart. The pictures illustrate it best. I've been lazy and nicked them from the Cryo Parts web page. The condition is excellent.