You have it right.
If you look at any Ghia bumper, it is not possible to cast or form them in one piece, so that's why stock ones are 3 pieces for the basic blade. I believe Brad was able to make his in 2 pieces, welded in the center. The parts come from the foundry as rough sand castings.
You will also have to figure out how you are going to mount them. They don't mount the same as stock. I'm not sure, but I seem to recall he cast bosses on the inside so that you could drill and tap them, then install either bolts or studs with nuts on the inside of the body.
Here's another idea. Brad will know if it is feasable. Instead of bronze, get them cast from aluminum. Then do all the work of filing and sanding, then finish by polishing only. No chrome. I think the shrinkage for Al is less than that for bronze, so it may work.
There is no doubt, they are the best looking bumpers that have ever been installed on a Ghia.
Emilio, it is too bad that the car was sold to someone in the US south east.