Will B7 Cab Armrest fit B7 Saloon??

[V6 Quatt]

Im in the process of purchasing an armrest which is from a B7 cabriolet..will this fit my B7 saloon?

The part number for the cab armrest is 8E0 864 207D 6PS

I will also need the mounting brackets too. Any idea how much they cost??

Help and advice appriciated