If available in the correct colour, it will be next to nothing, but the OP may find that they only offer it in Black, if so then it is possible to repaint with trim paint.
I had many of those kicking about but sold all the interiors I had spare so no more.
I did have a conversation (extremely long and drawn out) with a local MB dealer last year. They could not find the part even though I gave them the part number. Later they said they could get one in black for about £30.