Its never too late! Welcome to the site. I did a quick search for you and found this site which has the backing track (no guitar, but vocals are included) for "Taking Care of Business".

http://www.guitarbackingtrack.com/play/bachman_turner_overdrive/takin_care_of_business.htm

Not sure what your practice setup is, but you can get software/USB interfaces that will allow you to plug your guitar into you computer, provide effects like amp simulators, and also allow you to play along with the backing track.

BOSS also makes a nice unit that I'm thinking of getting, the JS10... which allows you to just plug in an SD card, and play along with backing tracks. It has a high-quality effects processor, which is nice.

Good Luck!