Susato Low D Joint

I bought a Susato Low D a few years back and I managed to lose the small joint between the body and the headpiece (the glue between it and the body came loose). Now my only low D whistle is unplayable. I checked the susato website, but I can’t seem to find a way to replace this thing. Anyone know how I can somehow get a replacement?
I dont know exactly what model my whistle is, but its a Low D, and its all black, and I ordered it about 2 years ago from the Whistle Shop.
-Kel