Adding custom LUT to Media Encoder preset

I'm trying to make a custom preset in ME to export a bunch (like 100) .dpx files with a custom LUT but I can't get the LUT to appear in the dropdown menu. I've tried using the "select" option and I've made LUTs/Creative and LUTs/Technical folders and restarted ME but only the preinstalled LUTs are displayed. I can add the LUT in DaVinci and export each clip one at a time but that would be very time-consuming. I haven't tried Premiere but it would be a boat of similar size and shape. Am I doing it wrong or is there a workaround? I don't work with LUTs or ME often so any help would be appreciated!