Charleston Cupcake Delivery?
You can try Cupcake Down South: http://www.freshcupcakes.com/Charlest...
Looks like your brother is probably in the hand delivery area downtown, so they would just charge $5 for delivery.
That being said, I would highly recommend asking Glazed Doughnuts about a delivery. I *think* they will deliver a dozen downtown without a surcharge. I would take Glazed doughnuts over anybody's cupcakes any day of the week. http://glazedgourmet.com/