I can give you some sources for interior pieces. For carpet, Stock Interiors of Chatsworth, GA. It's all US sourced and made, by Americans. LEM Trucks has provided a lot of my interior products. They have what you need for interior pieces. Jeff's Bronco Graveyard can also have a lot of interior pieces as well. I'd be careful about eBay vendors, there's very little recourse with eBay if a vendor doesn't work out. Eastwood can provide things like ExMat for insulation and paint.
Here's my $.02 about finding a painter: I was doing a significant build back in the 80's (before the internet) before there forums like this. Put it this way, that vehicle had the drivetrain and frame in place when I started. I attended local car shows to get ideas. That's how I found a painter. I wanted IMRON, the top of the line at the time. I did a lot of the work on a fiberglass nose that the paint shop repaired. I had another guy weld in the floors. I hired a welder to come on site (my driveway) to make radiator mounts. And on and on. I think you get the picture. Your project looks the same. With the equipment that's available today, you can do those door jambs yourself. Just take your time and trial and error.
I'm the wrong guy for spousal advice, but I've lived through six built trucks, not including three dive boats that she never stepped foot on. I'm currently in the process of a 35K$ workshop build with my bride's acceptance. I said acceptance not agreement. A simple " Sure, OK" or like your Dad said, " Yes Dear". It really does work
Best of luck on the project, don't give up, ever
Just my humble $.02
AbleDiver out