There are quite a few SLA machines on the market. Parts can be made in metal if you have the bucks and time. I have even seen machines that work in wood and paper. They are not printers but lasers that slice the profile out of thin sheets that are laminated. Those parts are very strong. SLA machines are the additive method. There are also multi-axis bench top mills that work off of the same types of files. My dentist has one of those. He takes a 3-d image of the mouth before he preps it for a crown. Then he does his thing preparing for it and shoots another image. The software then creates the model and the mill cuts the ceramic replacement. All in about 20 minutes and $800.