Here is a solution that allows the use of your original mouthpiece and modern reeds. Have the mouthpiece refaced to tenor sax (C* or C**) or bass clarinet specs, then use that type of reed. I found this to work well on a York and a Buescher. They now both play much more in tune than with a tenor or alto mouthpiece. I had Anello do the job, but there are plenty of other good techs that read this site who could do this for you.