As I've mentioned previously, my Father passed away in 2011 and his wife just recently decided to start letting go of all his jewelry making equipment. I'm a bit overwhelmed with much of it. One of the items is a handpiece that I'm not at all familiar with. I think this is it: https://www.badeco.com/product/295-strong/ The collet that holds the bits is broken. I've contacted the factory (in Switzerland, I think) on several occasions and can't get them to answer me. Can anyone tell me where to find a replacement part for this handpiece?