Notice how every single artwork of fem marines posted in this thread portrayed them as either cute anime girls or buxom semen demons.
Dude, we know how GW models female models nowadays. They're gonna look inbred and more like men than even Calgar. You're not gonna get the porn you're looking for... Actually, you already have tons of porn fanart, and printable big titted bodies, and green stuff/putty to model huge bazoongas and whatnot. Why do you need it to be official? It's not gonna change anything, it's just gonna fill the Marine range with ugly trannies like the Stormcast range from Shitmar.