Hi Missa,
Well, this is not directly related to your stuff, but I read your comments about how difficult it was to find and adult model/performer with a touch of "nerdiness" enough to be capable of making a fetish shot without any issue so she could play the role with some guarantees (I understand, some seriousness and acting capability).
Recently I remember that I knew about a girl who, at least for what she says about her, could perfectly fit there. Her artistic name is Isobel Wren, and you can find some of her here:
http://isobelwren.com/
http://www.wrensamerica.com/
I don't know if she is a bit far away from your location, or her prices, but I suppose that she could be very reasonable

.
I hope this helped you.