Why you would like to buy aftermarket? You may install OEM navigation.
Part numbers are;
5" Navigation + display unit
Front panel ;
BM51-18835-BE3JA6 (plastic cover)
You will need antenna cabling too but I could not find part number of that. But it is only balanced 120 ohm cable. You may find that all audio markets. No need any other part.
You will also need to find map for navigation. I do not have any idea part number of US version. That would be in SD card.