Since you have to look so hard for a store that sells organic produce, I'm guessing that you probably don't eat it yourself. May I ask why you are so keen to get organic things for your bird?
Is it organic bird food (i.e. Pellets/seeds/crumbs) that you are looking for or fresh food such as fruits and veggies, or both?
I can't see in what country you live, which makes it that little bit harder to help with specific answers. Is it possible for you to order online? More often than not, mailing cost will be less than a train ride
With fresh produce, there are many ways to remove and/or neutralise pesticides that may remain on the veggies and fruits. Leaving them for a few minutes in a sink filled with water and a cup of white vinegar is one of them.
It's not just good for birds do do that
As for sprouting, I do it myself and enjoy it immensely. Our bird doesn't yet eat sprouts but we're getting there (I sprout for myself and our family). You don't even need a kit: a large glass jar will do. Replace the lid by an elastic band holding either a cheese cloth, bit of mesh or even a piece of old (but clean
Here is a video showing you how easy it is:
I hope this helps