Here's the kindle bundle for anyone interested: https://www.amazon.com/gp/product/B088H5C3CZ?ref_=dbs_p_mng_rwt_ser_shvlr&storeType=ebooks

If you can't find any further volumes anywhere, it is unlikely anyone will. This is what I hate with mangas. I get so interested and hyped up and then I leave at a very bad spot because further vol/chapters have not been released or translated yet and I end up forgetting about it for months/years and eventually lose interest.