I do my own revolver work so I have never farmed any of that out. I do have a friend that was making barrels for TC’s. He made me an Encore barrel based on 307 Winchester brass. I liked that it had a rim so we went on to blow it out to improved style and then put a radiused shoulder/neck on. It doesn’t do a whole lot that a regular 308 wouldn’t do already but the wildcat has my name on it and there is nostalgia in memories of working it out together.
Good luck on your project. I think it’s nice to do things like this for yourself. It does not have to be justified as practical.