I have to agree with Jay and Jann, just buy them online.
personaly, I just buy the pupa stage.
toss them all in a large container that has some paper towels (or toilet paper rolls) in them for them to not be too crouded together.
while most places just say to use powdered sugar/powdered milk, and wood chips soaked in water.
I personaly like to gutload them with a mix that I've made in the past.
1) soft boild egg
2) 1 tablespoon of plain yogurt
3) 1 tablespoon of honey
4) enough baby rice cereal to thicken it a bit. (I've been using kashi heart to heart cereal lately as it has plenty of vitamins and extracts that will help our chams better...I just crush it up into a powder first)
the yogurt will have tons of calcium. the egg is for some protien.
the honey is to make it tasty to the flys. the cereal is for added vitamins.
just put the flys into the fridge for 5 mins to keep them from flying.
then add a small amount of the gutload to the side of the container.
reclose the container fast, and in 10 mins or so, your flys will be gutloaded with something far more healthy then just sugar and dried milk.
no real need to offer water as they will get plenty of moisture from the gutload.
feed the left over gutload each day...should last about 4 or 5 days before it starts to go bad in the fridge.
Harry