Your other option is to try ordering a pod culture from IPSF or Florida Aqua Farms. However, as was mentioned earlier, its difficult to keep enough pods going in a tank your size without a fuge to provide a sheltered breeding ground.
I normally would not recommend getting a mandarin for a tank that does not have a mature fuge. I let my fuge matue for over a year before I added a mandarin. Since I have added one, I have noticed a huge drop in the amphipods that used to be everywhere in my tank. I would retrieve at least 25 from the sock filter every time I changed it. Now I only get 4-5.
Gary
125 SPS, 75 gal. LPS/softie reef, 9 gal. Nano