I designed this model using Fusion 360. You can easily 3D print this model. I uploaded 4 files one of the files is assambled version of the model other 3 can be printed separetly if you are planning to make it bigger. From horn to horn model is 100mm(3,94 inches). If you face with any problems just text me. Also you can produce this model using wood as well. Card board would work too. I printed this model using Esun PLA+.