Toslink to SPDIF RCA digital converter

Suppose you had a transport that only had a Toslink out (and a transport that you were loath to get rid). And suppose you had a DAC that only had a digital RCA (SPDIF) in. I know there are converters such as the one listed below, which allow for a change in socket type, but is there on that was considered audiophile quality and did not “color” or degrade the signal in any way.
http://www.ramelectronics.net/html/audio_toslink_adapters.html