I truly wanted to buy a few pullets around 3 months are so, so they would be about the same age as the ones my broody hatched. I'm just going to think on it for a while.I was afraid to do it as well but I have never had a bad experience and I have ordered from several different places even though ideal is closest so I do use them most often. I have some ducks and chicks coming from them next week.
My bigger fear now would be from introducing some kind of illness from another flock. I only get new stock from hatcheries now.