Question about RF with Ltd Slip Option
 

My wife has located what could be the RF we have been searching for. The problem is it is with one of those "online" sellers. They don't list the option codes and there is, of course, no person to speak with. We only want a Grand Touring RF with the GTS option that includes the ltd slip. The RF does have the black top which is part of the GTS package but I don't know if it was also available as a separate option. Does anyone know if you could buy a 2019 RF Grand Touring with a black top and NOT get the GTS package or was the black roof only available with the GTS option? I've looked at many alleged VIN decoders but none list the options packages when decoding the VIN.

Thanks!!