An updated version is here: https://github.com/ValooFX/TCoSFileReader. If you modify it, you could potentially read the binary chunks of each object too and dump/convert them into corresponding files. But that involves knowing about the structure of those chunks and most likely some work, as this was mostly meant for reading server-relevant objects, so certain client specific data - textures, meshes, sounds, lights etc. are, via configuration, being skipped.
@Acid-burn most likely still has converted packages files that are readable by default unreal package readers, he may be of more help.