I told you I can give you a few of the files, but they're large 130MB for two part rar files, i.e. part1 and part2. Tell me how to give them to you and I will.
Also, doesn't The Unarchiver use the rar and unrar command line tools from RARLAB? If so then I don't see why it doesn't work.
Let me know how to give you the two files.