We have received a shipment of the GWH4813 MiG-29 9-13 from Great Wall Hobby and they are finally available to order in the UK.
http://www.creativemodels.co.uk/great_wall_hobby_148_mig29_913_fulcrum_late_type-p-32112.html
Unfortunately we do not have any of the 9-12 MiG available.