I heavily dislike companies that insist on final sale policies for internet purchases.
I found a loophole for these policies, but I'm not sure if it works at BCBG. Stores will sometimes waive final sale restrictions if you order the item over the phone and do a charge/send. Try calling a BCBG freestanding store and see if they can send the handbag to you and waive the final sale restriction since you are ordering sight unseen.