Do you really want to use a library with a questionable license in your project? Even if the source is widely available, it would be safer to consider it tainted.

Other copies of illegitimately copied code isn't going to save you from copyright infringement claims.

Clean-room reverse engineering of functionality could work. For copyright. There'd remain patent infringement issues, if claimed.

there's plenty of forks of the last version, I've made one myself :P

https://www.github.com/salgadobreno