I got 2 silkies 6 weeks ago and i also bought them as hens, these are my first hens and did not realise that they were difficult to sex. I'm afraid i can't help with rehoming but could I ask what age you were able to sex them, mine are 15 weeks and are still looking like females but i am not sure when I will know for sure. I bought mine from All year round birds, and as a novice I did not realise that they were not a true colour, bit blue/partridge. Still love them though, their personalities are coming through.
thanks for any advice you can give