2011 sonata limited with premium want nav system
 

I'm sure this has been asked before but I searched the threads and didn't see anything specific. I have a 2011 sonata limited 2.4. It has everything but the nav system and backup. It does have that premium sound system. I want to add the navigation system so it will work with all the steering wheel and gadgets already in the car. I looked at the advent, but of course it indicates theirs is not compatible with the limited! Of course....has anyone found a work around or system for this? Not sure why a factory one wouldn't work, but not seeing that. Help please! Ha. Thanks for any suggestions.