if your looking for a tank bag, you cant go much wrong with the SW Motech rang they clip onto the fuel cap outer and are pretty good
Can't imagine why they would change from plastic on the 2010 to a metal one on the 2013? Aluminium ones are very expensive.
Cheers guys looking at possibly buying a 2013 s touring which had a test ride to do and have an old Oxford tank bag laid around so was wondering if I could use it whilst I save up for back box.