Karaoke Forums

Hello!
I don’t know if my problem really belongs in this forum but I can’t think of another way to solve it now, I don’t have the time to do a thoroughly investigation on it. I need to make a karaoke-like video to be shown within a theater play, with the songs Wicked Game (Chris Isaac) and two opera pieces (Tosca- Vissi d’arte, Madama Butterfly-Un bel di vedremo). It needs to be impeccable and high quality, the audio as well as the video part. I can handle the video part, I already made the two opera files with After Effects animation, looks very good, but I don’t have the music for it, I don’t have the “only instrumental” music for either of them. Not even for Wicked Game. The problem is that I don’t understand anything of the technical part cause I never had anything to do with karaoke files. What I understood so far is that MIDI files are synthesizer music, that one I can not use, I need a good quality recorded instrumental music. Can you help me with any advice where to get it from, how to handle this problem?
Waiting for your response. Thank you. Kriszta