For my LCI trim update, I ended up building a harness using the part numbers I posted above. Something to note, I removed the connector that comes on the illuminated panel, and replaced it with an extra 61138377072 (1-1718346-1) housing I had. Simply because the connector was keyed differently.
Also, because I HATE shinny Piano black, I scuffed the panel with some wet 1500 grit paper, then re-sprayed a couple coats of the bare panel using Mr. Super Smooth Clear ( B530 Matt ) lacquer hobby paint to dull the finish.
I think it turned out really well. It's very hard to tell the difference between the sheen of the factory pre-LCI and the replacement LCI panel.