not need so much ,this is footwell light also can used in the dashboard and the door ,I mean i saw your product. 57€ is not that much for the "simulator" and 4 footwell lights.
But then again you have to change the whole ambient lighting (If you have one) all the door lights, skylight, dash trim,
For the standard ambient light it wil cost you 250€ for the front door, dashboard, footwell, 100€ for the skylight.
so it would be around 400€ with shipping.