Harmonica bends

I am scoring a 10-hole diatonic harmonica. I don't see any way to add bends. I tried using Grace Notes but that doesn't work. Slurs don't work either. I also tried the "bend" symbol from the guitar Palette, but no luck there either. Bending is an essential feature of blues harmonica; it would be nice if I could score it. Is there a way, or can you add that? Perhaps as part of a harmonica palette, to include other features like warbles and vibrato? But the absence of bends is really major. Thanks.