2013 OEM Non-entune/Non-JBL into a 08

Looking to install a 2013 OEM Non-entune/Non-JBL into a 08. I just want it for the touchscreen and the Bluetooth connection for audio purposes from my phone. I know that I need the 20 to 28 pin adapter and the antenna adapter. But does anything else need to be installed for it work for my purposes (no steering wheel controls, not voice stuff)? Also, easiest way to get the adapters would be from the dealership vs the scion audio adapter kit online? I searched a few of the other threads for this but it wasn't a clear answer.

 

Bump

 

Here is a thread I found.... It might give you some additional info.

http://www.tacomaworld.com/forum/au...igation-retrofit-diy-w-info-part-numbers.html