Lexus GS430 Audio input

Hey guys, I have recently bought a Lexus GS430 (2007).

I want to install an aux input on the car basically, I don’t want to connect to the car via Bluetooth.

I have owned other cars but never a Lexus. So I don’t know what shop/garage to take it to.

Does anyone know where I can take it to get this thing done?

(SHJ/AJM) would be the perfect. If not Dubai works too.

Thanks