There's a picture in a thread somewhere here of a Golf, in the EU, with the fins, just a matter of finding the part number.
Edit: Oddly enough the e-Golf here in the states comes with the side fins (according to pictures on Google). Parts.vw.com shows them as well, but with the same part number as those on the GTI but says they fit Golf, e-Golf, GTI and R. I then checked hatch part numbers and parts.vw.com shows the GTI with the same part number hatch as the TDI/TSI/e-Golf. According to the clubsport spoiler thread GTI/R (and by extension I assume e-Golf) come with -K part number hatch which comes with a plastic spoiler (and has been superseded by -AB part number hatches) and that's what the fins line up with. The -Q part number hatch is described as "without spoiler" and the fins won't line up.
Hard to determine fin fitment since all of the hatches are interchangeable. The Golf in that picture must have been a trim option that included the "GTI" hatch and therefore got fins as well.