This i guess is not available in an online store plus without a tape recorder (not just any) you will not be able to get the pleasure of hearing any of these.The best analogue to my mind is 15ips 2 track tape, particularly production or safety masters. Those are used to make digital copies, including CD's which come from analogue sources.
So when getting the best copies on CD we could get very close....
He does use DAC chips, but for reasons of linearity he uses industrial precision chips (AD5791 BRUZ), normally used for medical and military precision applications,
I think "Metrum" did the same some years back..... Not sure if this means anything for audio, sounds more like a marketing story.... For me the current source DAC's are best sounding still (Philips multibit).... but again i like to be convinced otherwise if it can be better as i am like many here are straving for the best....