Anti-jitter device with I2S output?

Hi all,

I'm running a Muse 2+ DAC, which sounds dandy through the coax input, but this model also has I2S input and I've heard that this takes the DAC to a whole other level. I seem to recall seeing somewhere an anti-jitter device that could output a I2S signal from coax, toslink etc. Anybody know of such a thing? I suppose there might be options from Apogee, Camelot, Theta, Monarchy etc. Let me know if you have any experience to share.

Thanks,

Jeff