There are a few designers that specialize in Cosplay custom latex designs, but one of the most proficient might be Andromeda Latex. Most of their designs are amazing, and they also experiment with textured latex, such as snakeskin....very cool.
Once again, I ask, why all the female designs? Are there not enough men with the guts to design a latex cosplay outfit? Granted, the male cosplay outfits are generally never as skintight or body-hugging as the female ones, due to the general sexist nature of cosplay.
Here is a non-latex take on the Mass Effect Commander Shepard cosplay outfit.