I seen these two manninques a that I think would be perfect for creating a protocol droid here are some pictures of them and the links for them. First photo link (http://www.amazon.com/MC-FFXKEG-Maroon-Female-mannequin-flexible/dp/B00H9K2HFA)

Second photo link (http://www.mannequinmadness.com/collections/male-bendable-flexible-articulated/products/male-articulated-mannequin-colors)