They are all definitly roosters and the first one, the lighter one, there is no way he is from Williams lines, that is a typical Production Red and Williams birds are the good dark ones like the one you thought was a hen are what Williams birds look like. And it is Robert Blosl that has the Mohawk line, Williams are his own line and I dont think he has given them a particular name, I've never heard him mention one anyway.
And yes William is most likely sold out for the year becuase I think he said he has sold his hens and is growing off replacements, but he and I have another friend that has some of his birds and she will be selling chicks from them this year so if you PM me I can get you contact info for her.