I'm sure if enough people showed interest, Wiring Specialties would make a run.
They tend to be pretty cool about that.
DR25 is pretty cheap, and if you depin your existing harness it will keep the costs pretty low, if you went the DIY route.
Pegboard is your friend, and makes it somewhat of a breeze.
I've made a few harnesses for MS builds, but never thought to go after the n5x harness because although its ugly, its pretty nice.