Here is my situation. I am restoring a '71 Challenger that has 4 wheel drum brakes. I has been modified with a Road Runner rearend with 11" finned brake drums. The original front drums are smooth. I would like to have the brake drums look original. Do they make an 11" brake drum that is not finned? I have ordered a set locally and they ended up being finned also. Would I be able to find these in a bone yard? If so what year & model should I look for?

Thanks.