I tried almost a dozen different cable manufacturers to no avail in trying to get a custom made I2S cable with different "pinouts" at each end. Most of the hardware manufacturers do supply a diagram of the pin configurations which use a male HDMI style connector. Some of the newer gear has user configurable options for the pin-out, but it is worth verifying before you buy the gear that the I2S connection on both ends will match. I finally got what I needed by buying a DDC from the same company as my DAC (Gustard) and it can accept a standard HDMI configuration for I2S. I had temporarily used a 6" HDMI cable which was probably HDMI 2.0 and eventually bought the DH Labs .5 meter for connection between the DDC and DAC. That I2S connection, and the additional isolation provided by the DDC give a low cost digital front end a real qualitative improvement running through a top tier analog system. I was never a digital fan, and I am actually enjoying this- using the set up to play files from an SSD using the Shanling ET3 as the player. It is a fraction of the cost of my analog front end and I'm quite impressed with the SQ, especially given how little money was spent on the digital front end.