I could not find profiles for the 9890. Found the page with other profiles but not this model.
Do I use one that is for another machine?
Using your new ConeColorPro inks.
For Epson media, you use the Epson provided ICC profiles and the Epson recommended workflow. For 3rd party media - we do not have an Epson X890 printer on which to make our own library and we have not provided a 3rd party media ICC library for this model. You can either purchase custom ICC profiling services or get your own profiling kit such as a ColorMunki or Spyder - both of which will also calibrate your display. If you already own one of these and have not tried the RGB printer profiler - they both work great. If you wish to try 3rd party media profiles made for Epson inks with your ConeColor setup - make certain that you explicitly follow the driver settings and workflow for the 3rd party media profile. If none are provided - stay away. You should use an ICC profile made for your printer model, the inks, the media, and the same exact driver settings.