70-73 Camaro lower rear inner valance source???

[azcamaros]

Try Desert Valley Auto Wrecking in Phoenix, if they have one they will cut it out and ship it to you. They are the the cheapest but they typically come up with nice dry western sheet metal.
When doing my 71 I was lucky enough to have a panel that was could be saved. These things take a beating and are usually hacked up by the previous metal butchers trying to do bodywork.

Good luck

[DarrenX33]

When I had my 72 Z that was the part that I looked for forever. No one makes a repop inner rear valance. Sorry to say you have to make it from scratch unless you can find a perfect donor car to take one from but how much is that gonna cost in labor? I am surprise we still have nothing from the repop arena. Hmmm...

[70-SS/RS-L78]

This is a tough part to find and they are always rusted, I have made a few through the years or patched the rusted area.