It dose not exist. Simply because the stats reach cap at MK X green.
For example, MK X white console might give a bonus of 28
The same MK X console in green would hit the cap at 30
You wont see blue MK X consoles because the cap wont let the bonus be higher then 30. But you can find blue MK IX consoles that cap out at 30. Oddly enough these consoles while functionally the same as MK X greens. Seem to be worth more on the exchange....go figure.
Obviously with Blue MK IX hitting the stat cap. Purple MK IX are also absent.
The highest level purple console you are able to get would be MK VIII and they are functionally identical to MK X greens.
The only way we will ever see purple MK IX or X consoles would be if the stat cap was lifted or if there ends up being a higher Mark of equipment beyond MK X