Create 50 t-shirt image masks

We are looking for someone to create 50 high-quality image masks for t-shirt photographs.
We want to use the masks to change the color of the t-shirt in the images.

We need the masks as png images or as psd files.

Please make sure that there is no white border remaining at the edges of the t-shirt and the color doesn't bleed into the surrounding area.
Some images will have hair or other objects partially obstructing the t-shirt. In these areas the masks will need lots of detail so the original color does not shine through.

Please look at the attached images to get an idea of what we want to accomplish.