Below is a hbv drug watch from the HepB foundation website. As you can see, there is no one working on drugs that aim to target the cccDNA directly, at least from this info. I'm not any expert, but it seems to me very strange when the researchers know the cccDNA is the genomic reservoir that keeps the chronicity of the disease, yet, no one is researching on how to hit the cccDNA directly.
http://www.hepb.org/treatment-and-management/drug-watch/