I would think it would need alot of modification to sit right, but never say never.
 
I doubt this very much but give it a try... buy a cupra spoiler, it fits and is slightly bigger.
 
i would say no it wouldn't as ther is a indent into the roor/boot where the spoiler sits and quite simply the r32 spoiler wouldnt be anywhere near filling that gap, as adlav said get a cupra one looks nice but suttle costs £120ish from seat!!