They come and go. The oat-based ones (Cheerios at Costco, and Oatmeal Squares at our local super) disappeared right after the
glyphosate tests came up positive.
http://www.huffingtonpost.com/carey-gillam/fda-tests-confirm-oatmeal_b_12252824.html
My guess is that GM, unable to source agrochemical-free oats in sufficient quantity, had to stop shipping to countries that have strict rules on this. Just a guess.