Are they both almost 4 months, or just the second one? How long has the first one had the darker, larger comb (first one)? I think the second is a pullet. The first may be too, it is hard to tell by the pics.
You should try CL. There are lots of people with fertile eggs. Since you don't really care what they are you could really just ask anyone that you find selling eggs if they have a rooster with the hens.