You have to do a return/rebuy and pay the extra $20 that the bundle is now. I did it on Sunday. Still a better deal than the Black Friday price as you're gaining an extra $30 back, and you can make out pretty well throwing that gift card toward the B2G1 going on right now. Three brand new 40 games a little less than $17 a piece before tax.
Some people have reported getting an adjustment keeping the BF price, but I wouldn't hold my breath.