Kirby G4 Vacuum "BOOT"?

Question

I'm not too sure of the name of the part i need. It is where the bag hooks on to the vacuum, the hard plastic boot. It's the thing you clamp the bottom of the bag to. Mine has seem to come unglued and makes a crack where the dust comes out while vacuuming. I'm not to sure if this can be glued back together or needs to be replaced and if where to buy it? Thanks in advance for any replies.