Most convenient and budget friendly Mice feeders in San Diego?

Hey guys! I have a corn snake thats ok fuzzies right now and he’s doing great. However, I do get his food from the local mainstream pet stores such as petsmart or petco. Not only are the mice expensive but don’t seem to be the best compared to when I have gotten mice from Layne Labs at a reptile show once. I would order from Layne Labs again, however the shipping costs are murderous. Any suggestions as to where I could get decent mice for cheap in San Diego? Thanks!