XMOS XU208 USB Card 1:1 Refer to Amanero USB Card Support DSD DOP for ES9028PR : Amazon.ca: Electronics
Yuan Jing Audio - XMOS U8 USB Audio 32Bit / 384KHz USB to I2S Converter Daughter Board LP - USD $39.50
GOWE Audiophile Version XMOS USB Digital Interface/Sound Card Ouput Coaxial/Optical/I2S/BNC Support DSP DC9-12V - Amazon.com
DIYINHK XMOS Multichannel 32ch USB to/from I2S/DSD SPDIF Interface | Dimdim's Blog
XMOS Distributor | DigiKey Electronics
Amazon.com: youyeetoo Khadas Tone Board Hi-Res Audio USB DAC Based in Chip 32-bit ES9038Q2M XMOS XU208 External Sound Card with S/PDIF Input(Generic Edition) : Electronics
SA9227 USB to I2S digital interface coaxial sound card for Amanero XMOS DAC | eBay
XU208 XMOS PCM DSD I2S USB card good for DAC Gadgets - Newegg.com
Yuan Jing Audio - XMOS U8 USB Audio 32Bit / 384KHz USB to I2S Converter Daughter Board - USD $42.50
DIYINHK XMOS Multichannel 32ch USB to/from I2S/DSD SPDIF Interface | Dimdim's Blog
XMOS-XU208 digital interface/USB asynchronous daughter card/module USB to I2S/ for sale online | eBay