Transport for HDCD

Looking for transport (20 bit output with HDCD) for my Assemblage 3.1.

I think so many cd transport is only with 16 bit output that it is quite hard to find 20 bit output one.

Thank you for your suggestion.
Transports just output the raw digital 16 bit data that is every redbook CD. The DAC is the unit that would have 16/18/20 or 24 bit resolution and it would also have to do the HDCD decoding.
Agree with Blackie; you need a new DAC, not a transport if you want HDCD. MSB Link DAC III has a HDCD module. Also Cambridge Audio S700.