I believe I have the same model 'deck' that I am having trouble finding a DVD for. I have a US-spec 2009 Kia Optima SX with an infinity deck. I was tempted to try some dvd's from other models, but was just weary in case you can possibly 'brick' your in dash radio.
I have a similar problem. Just brought with me to Uruguay my Kia Sorento 2014 from USA. I need a way to unblock the GPS and loading the South American maps instead of the US ones. Thx for any tip, Ricardo