Update - Midland directed me to additional DCS tones at the very end of "their" numeric list, which is not sequential with the DCS tone numbers, but their own set of numbers. ? Either way, I can now enter the correct Repeater split tones for the Denver Area Repeaters.
On another note, by asking my Support Contact, I was given a code for a 20% discount of a new MXT115. Not exactly what I was hoping for, but better than a "poke in the eye". I guess I need to make a couple decisions on future direction, and if Midland will be a part of my equipment going forward.