Roomster can bus relay converter 487, head unit upgrade

Hi all

I am wanting to get a canbus converter from 1.6 to 2.0 to upgrade my head unit.

I have seen a relay 487 part number: 5J0 035 751.

I know they mainly used these in Fabia 2 and roomster.

There is a few local scrap yards near by so I'm hoping to have a look around there German section to see if there is any cars that has it fitted from factory.

Does anyone know if these relays came fitted with the car, also would the be located under the steering wheel or behind the head unit?

I've seen one from Czech which is quite pricy with the delivery so it would be ideal if I could just pop to a local breakers.

Thanks for any help