Shoot, I see that now in an earlier post. Dang reading comprehension fails me again. Not sure about how far away you are, but I know the MF Auto guys in Knoxville have always done right by me, I grew up in East TN. You can check on the malone website for closer dealers though. I think apr or upsolute is down south too, Alabama or GA, cant remember. I know when I bought a spare BHW ecu, I had to have an immo delete done or it wouldnt run, just crank. I would assume there is something like that on the jeep, but if you're only running the gauges, you may not care. It might send a kill signal to the cluster or battery/alternator though, not sure. A jeep forum might be helpful? I know EVGuy on here has done a handful of swaps, he might be of some help. Used to sell/make adapters too on his website.
I found it quite helpful to go onto the VW site at erwin.vw.com and pay for a 60 minute or 24 hour subscription. You get access to all of the factory wiring diagrams, service manuals, etc, downloadable in pdf form, and you can then access and print them out. I did that for my swap and just spent time staring at them to figure out what was needed and what could go. I'm still pruning slightly to clean it up and get all the lights to go away. There are a few videos online to learn how to read the vw wiring diagrams too, once you get the definitions it's pretty straight forward. Sounds like a fun swap!