Stereo Fix and Cleanup for MP3

I need an MP3 song that currently only plays from one speaker or one side of headphones fixed to play out of both speakers or headphones. Additionally, I want the track cleaned up by removing fuzzy background noise and enhancing the clarity of vocals or instruments.

Requirements:
- Fix mono sound to stereo
- Remove background noise
- Enhance clarity of vocals/instruments
- Deliver final product in MP3 format

Ideal Skills & Experience:
- Proficiency in audio editing software (e.g., Audacity, Adobe Audition)
- Experience with mixing and mastering audio tracks
- Attention to detail for high-quality sound improvement
- Ability to deliver within budget and timeline