@Lazpi if you have manual gear then a final FJ would be fine for you. When searching for it you should care about asking the seller if the car that donates the 46 units originally had the keyless. By doing this you would the able to install later keyless system.
If the seller doens't know this info ( usually it happens ) then you can ask VIN of original car and with VIN Audi can tell you info about keyless. Or, if you are lucky, you can see the connector still connected to the 46 unit and by checking wires color then we can tell you keyless were installed.