Im starting to pick up guitar again after years of not touching it ( thanks a bunch college!). To get back into it I need a standard 12 bar blues backing track. I have a few backing tracks but they are all a bit weird and wacky, and to get the basics again i want a simple 12 bar blues ( in A or E!).

ive searched google but can find nothing. can anyone advise where i can find such an Mp3?
bluesblast.com should have what you need sir.
I've got something in my front pocket for you.
Why don't you reach down in my pocket and see what it is?
Then grab onto it, it's just for you.
Give a little squeeze and say: "How do you do?"
Hey, you're lucky, I just happen to have made 2 of those for my Ultimate Guide to Guitar
Check them out here! http://www.ultimate-guitar.com/columns/the_guide_to/the_ultimate_guide_to_guitar_chapter_i_3__scales_-_the_basics_-_pentatonic_scales.html