Just figured I'd post a quick update.
I ended up driving it down to Haas Transmission for a rebuild, had to drive down that way to pick up another car anyways. I emailed/called 4 different (re)manufacturers asking if they're units had the mounting points for the factory shifter and none could guarantee that I'd get one with them, maybe they're just trying to sell their shifters idk. That combined with the fact that swapping the tailhousing does indeed void any guarantees on the trans, convinced me that rebuild was the way to go. I appreciate all the suggestions and help with this, hopefully the Charger will be back on the road soon!