There are many DACs for RPI Zero. Most of them low-priced, carbon copy of datasheet, slave DACs.
Allo Miniboss DAC for Pi Zero
This is the implementation of the first Master DAC based on PCM5122 with many improvements over the standard circuit. Instead of the RPI giving the clock on the line, the DAC itself sends the clocks, and RPI sends the data (file to be played).
• Compatibility: RPI Zero/W , Volt+
• PSU: Power is taken from RPI and then heavily filtered for each rail.