Hi!, your proyect got my attention!, and the medieval age too!, i can make your models in Solidworks or Blender. In order to get the precise measure, please, send me your measures very detailed so i can work better for you. Give me your Shoulder Pauldrons idea too, if you have any sketch or picture and if you want me to do modifications based on that idea. I will need a constant feed back from you.
When the model meet your requeriments i will send you all the files in blender and solidworks, and the STL Files, so you can use them in 3D printer.
Feel free to see my PortFolio!.