Unfortunately, female templates are just about non-existent because of the diversity of the female body. I have some templates, but they are for metal armor only, and if your willing to use metal for them then I have no problem sending them to you. They are small plates and will fit up to a C-cup.
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The white one is my girlfriend in her armor, and thats the armor at a B size. The purple is her roommate, and her armor is made for a C.
There is another alternative, and that is bending a normal male chest plate in the center so it follows the curve of her chest. I've seen a few done this way, and it works well if the bend fits the chest properly.
Let me know if you want those patterns and I'll fax or copy and mail them to you.