First off, before I comment on the DRAGON, I would suggest that you remove your email info from thread; you might get inundated by a rash of junk if you don’t.
As far as my DRAGON setup, it is very rare and older of course and probably the reason there is a lack of information or reviews. Only 200 were ever made and most were not manufactured for export to the US in the 120V version.
Sonically, together they are fantastic! The DRAGON-CD Limited had its own internal DAC processing, but if you wanted the best, the optional DRAGON-DAC could be ordered for an additional 5K. The DRAGON-CD came with its own PS that could also power the standalone DAC if needed (Refer to the rear of the photos of both PS above).
What is your setup, just the DRAGON-CD or do you have a PS with it. If so then all you would need is the DAC, I just happened to find one that came with an additional PS in the 100V version. Which is fine since both PS units convert to 12VDC to power both the CD and DAC, so technically I use only one and have the other as a spare.
I just happened to find a DRAGON-DAC in Hong Kong yesterday, do not think it has any of the cabling or PS, but it looks in outstanding condition, and being offered at a reasonable price. I will PM you the link so you can check it out. You might need to broker through a local agency to help with language barrier and procurement if needed.