Ive just searched asda online and couldnt see them, they did have the fast oats (I think thats what they were called) but it doesnt look like theyre individually bagged.
You could always buy a big bag of plain porridge oats and measure them out into individual bags at the right weight for your hexB and then theyre still ready to grab and go? it may take a little time to get it done initially but think of the money you would save too haha.x.x.