I have a p-89 that I want to get a shoulder rig for. I have seen several Bianchi x-15's on E-Bay, and they look like what I am looking for. However, the sizes get confusing, they have small, medium, large and x-large. I really need to know what size to shop for to fit the P-89. Anybody able to help with this? I checked the bianchi site and they have a 2, 3, 4, etc size system.