E-Body firewall metal

Is there any place that offers firewall metal without any holes punched in it

Probably better off to buy a good repop firewall and fill in whatever you don't want as opposed to buying a lesser quality piece that isn't fully stamped.

Are you planning on patching it or replacing as a whole?

I just made patches & filled (welded up) all of the holes that I was not going to use on my Challenger.

not sure
are there pre cut inserts maybee