finding a specific karaoke title

I am brand new here. I am a songwriter and I recently wrote a spoof of Willie Nelson's, "Momma's don't let your babies grow up to be cowboys". I can record the song but it occurred to me that it might sound better if I could just download the background music. I don't have any objection to buying it if I could just get the one track and if I could be sure it sounds authentic but what scares me most about Karaoke tracks is that the ones I have purchased are pretty lame. I play music so it usually doesn't matter but when I am writing a spoof, the more authentic the better.

So anyone out there care to guide me to what I need to do to get this track?

Meanwhile I'll meander around the forum and see if I can find an answer on my own. Thanks.