I am not aware of vendors being switched in 2010. The first generation used the ZF 6 speed for the 3.8 and the Nissan 5 speed (build by Hyundai) for the 2.0T. In 2013 the Hyundai 8 speed was used for all auto models.
Just checking on a Hyundai parts page and there was a change of transmissions on 5/28/10 and they have two different transmissions based on that date. I am on the before side of change so much smaller pool of used transmissions to work with. Perfect lol