Where can I drop off Operation Christmas Child gifts later than December 8?

I live in Southern California, between Los Angeles and Orange County, and I need to drop off shoeboxes filled with gifts for Samaritan's Purse Operation Christmas Child. The National Collection Week is over and the place in Irvine that's collecting boxes stops collecting on December 8. I will have the boxes by December 13, but where can I donate them? I don't want to send them by mail, because I don't want to deal with stamps and having the boxes getting to North Carolina safely and whatnot.