You do not need technical skills. VLC Media Player (free) can repair many Ex Yu MP3s automatically.
The Process:
VLC will re-encode the damaged parts. This fixes roughly 70% of all "Ex Yu Hitovi" playback errors. Ex Yu Hitovi Mp3 Download Fix
For vintage Ex Yu hits (1950s-1970s folk and chanson) that are truly public domain (rare), check Archive.org. Search for "Jugoton" vinyl rips. These are community-uploaded, safe, and direct download. You do not need technical skills
The phrase "MP3 Download Fix" implies a desire to repair the flaws of this downloading era. The legacy of the MP3 boom left three significant issues: VLC will re-encode the damaged parts
Deezer has 90% of Ex Yu discography. Use a free Deezer account + the open-source tool Freezer to download FLAC/MP3 legally for personal backup.