my school has a rare tuba (a de prins bros tuba), and these tubas are rare because they were mainly only given to schools, and many schools have gotten rid of them. However, someone stole the tuning slide of the tuba some years ago, and it is a great tuba and I am looking to get it working. The owner of the repair shop that our school uses happens to have this exact tuba, complete with the slide. Is there a way, possibly through molding/casting or 3D printing that I could duplicate the slide he has? Maybe some other methods?