Where can I get the installation software for Oracle 8i DB?

I have some backup files for an old Oracle 8i data that was created years ago. I need to be able to view this data and export it to a csv file. The backup directory includes .dbf, .ctl , .arc and a few other file formats. My initial thought is to obtain an installation of this DB so I can try to restore it. Is there anyway I can obtain it? (Any OS would be fine) Any suggestions on how to do this would be great.