I got it for free before it was released. I called EA and asked why doesn't the Dr. Pepper codes work and they gave me all 4 classes for free.

This more than likely won't work anymore EA wised up about people calling up saying there VIP code didn't work when they didn't even have one so I can't see the Dr.Pepper route working either,

Your best bet is to find someone willing to share the content with you if it work because I heard you can't on BF (I could be wrong feel free to correct me) and then there is the fact that your newer to the site you would need to find someone very trusting or get more posts/rep and a few succesful trades behind you first.

The only other way is to buy the content =)