Stacking Chip DACs?

I was wondering if there are any DACs that stack the chip set? If so what chips and who are the manufacturers? Also are there any that use transformers?

Thanks in advance.

Alex Paychex Of APL Hifi stacks the AKM chips in his NWO players. I am not sure about his DACS. You can research his site.
TDA 1543 & 1545 non oversampling chips
In dual-mono configuration the Twisted Pair Buffalo II offers 8x ESS Sabre 32 bit DACs per channel-- but you have to assemble it yourself. At some point I'll try this with Audio Consulting Silver Rock output transformers.
Monarchy did. In DIY-land try the DDDAC.