Try Hirts! they sell 1500 for $9

     https://hirts.com/1500-live-ladybugs-hirts-nature-nectar-guaranteed-live-delivery-no-ship-to-hi/

if you use ladybugs you dont need a ton of them. release them with the lights off. store the extras in the fridge or a cool place and you can keep them alive by feeding them a few raisins