Have you tried a slide-and-bend? It may not work in every context (especially if you're immediately returning to the initial note), but you might be able to fudge it by sliding one fret and then bending. Some frets are pretty large and would give you a decidely "stoppy" sound to the movement, but two of my guitars have very slight frets and...

...never mind.

I just tried a step-and-a-half bend and can't do it. (mediums on a 25" scale guitar)