, Welcome to TAI..
My friend to had an MM540, we searched a lot for the wiring kit but finally dint get one..
Finally got an reliable electrician and he made the entire wiring kit for the jeep..
It was almost the same of the OEM kits, it costed 5.5k i guess, I will update the correct price after asking from my friend..
I can share the electrician number if you need..