AUDIO 2.0 USB to i2S bridge based on XMOS X1s U8A chip

Hello, there are on the market some board to bridge USB to i2S and DSD. Example of ready boards are "DIYINHK Isolated XMOS USB Interface" and "Weiliang Audio" (really an on-line shop on [login to view URL]: look for "XMOS U8 chip USB Module support DSD I2S"). I need the same kind of interface. They are based on the XMOS X1s U8A chip, and there is a simple "firmware" for a flash memory to let the U8A plays the right "game". Useful are the application notes from XMOS web site: 1) USB Audio 2.0 Reference Design XS1-L1 Quick Start 2) XHRA-2HPA Datasheet 3) xCORE-AUDIO-HiRes-2-DAC-HPA-Reference-Platform-Hardware-Manual_1.2 There is a PCB well documented.