This is the place I use

Here is a link that might be useful: March Biological

listen to fiedlermeister i us the same place, right now it is about the only way to get control.
dan

LET IT BURN

You can spray them with insecticidal soap, it's going to take several applications and good coverage though. Don't have the light on until the soap spray is dry, so you might want to do it at night with fans on. Aphids are one of the worst enemies of pepper seedlings along with spider mites.

you most definitly will get the aphids to spread.

best bet is to remove any pots with dirt and remove any dirt from the area of your seedlings.
aphids require one step of their lifecycle in soil, if you remove that and are using new seed starting mix or soilless mix, then you should be able to quickly get rid of the aphids.

Plus if you do see a few that make it, the insecticidal soap should work better and you can keep a handle on it until you can find ladybugs.
I have never gotten ladybugs, but we use Planet Natural catalog for the green lacewings and other natural beneficials we have bought.

Here is a link that might be useful: planet natural-free shipping right now