...my blogbuddy over at Reduce Footprints posted a great little article on how she wanted to get Fair Trade Certified organic bananas, but didn't see them at her grocer's. So she asked.
And when the produce guy said they didn't have them, she mentioned she'd like them.
She kept it up for a while and voila' - eventually the store tried stocking them!
In my experience, grocers want to know what their customers want. If you ask, they just might order some and see how it sells. So don't be shy - ask! And if and when the stuff comes in: buy it and thank the staff!. They took a chance on you, now repay them with your business.
I think you'll enjoy the whole story: "Banana fanna fo fanna ...". It's a good example of making a difference AND getting what you want, just by trying!