Its called Catalina Flying Boats i beleive. I think (although i ight be wrong) they are based at SNA. They mostly fly a 208. I think they only have 1 or 2. havent seen the DC-3 for a long time, but Im sure they still have it. I also think they are a Fed-Ex feeder if that means anything to you.
I fly into AVX all the time on customer check outs. I have seen the DC-3 there about 1 out of 15 times. They only use it when the size of the package requires it. Otherwise, the 208 will haul everything they need.