If the original is now public domain and the replica is not advertised as the original, I'm not sure what the ethical issue is? I do see a financial issue thou

If the original is now public domain and the replica is not advertised as the original, I'm not sure what the ethical issue is? I do see a financial issue though, cheap clones are CHEAP - and if you want something that can nearly pass as authentic (which I'd argue is a work of art on it's own) you'd be looking at a very narrow market of buyers. Again, as long as replicas/clones are labeled as such and the original is in the public domain.