I have a 1965 Getzen Eterna Severinson and It does not have a 1st valve slide. The slide is parallel not of set like most other trumpets that have a ring there to use. And as I prosed to more serious music I need to use it but I does not have a ring there. I was wondering if it would be possible to have a repair guy make one? But it would have to be floating from the back end of the slide to the valve casings?