The real thing, steel or metal is great but you could do a faux finish print on PVC. I did this for a client for a trade show booth, looked pretty cool.
That looks real good, like the real thing.
A good option as well if your looking at weight issues, having the
sign up on a booth I imagine it's much lighter than a metal.
We actually cut I think it was a half inch or inch thick aluminum on the CNC Router to use as ring around the center piece to make the letter "0"
but had to rethink it, we had concerns with the weight of the metal and decided to go with Dibond.
Did not want it falling on anyone lol.