Upgrade from 4 spoke MFSW to 3 spoke MFSW

Hi all. Long time lurker first time poster.

I'm making enquiries with a number of Skoda dealerships about getting my hands on an Octavia 1.6tdi Elegance Spec (Ireland).

Would anyone have any idea how much the (general) cost would be, if any, to upgrade from the 4 spoke MFSW to the 3 spoke MFSW? I like the sporty look of it .

Also looking to order the RS Spoiler; would it be much more from factory?

The dealers won't be able to get back to me until Monday, at soonest; so would like to get a general insight into how much these extras would cost.

The UK price shouldn't be too far off what I'll be quoted. So looking forward to hearing.

Thanks in advance!