I live in south america and all major ag countries down here allow transgenics. The market for conventional beans is too weak to warrant the extra cost of planting conventional beans in a field with a high weed population. At any point that the market starts to offer us farmers the necessary compensation for conventional beans we will start planting them again. And as a seed producer, dont worry because conventional seeds are widely available, i have a whole warehouse full of it.
I think as more and more people start to demand non gmo then then price and thus availability of non gmo products will go up.
If you want this to occur quicker, start a labeling company for non gmo products. It will not only make more people aware of gmos and thus increase their demand but yu will make a many buck. Even an app would be great that scans barcodes and tells if they are gmo free.