2015-2020 Impreza swing arm on a spec B?

[phish27134]

I had tracked down a lower control arm for my 07 spec B. drove 3 hrs to get it go to replace it realize, the bushing is completely different, although the control arms look identical the bushing is a lot larger and has a protruding piece, where as the original spec b is flat...Is there any way to make this work? Possibly replace the stud bolt in the vehicles body?

 

I contacted the people whom, I purchased it from, which says 08 spec b on the bottom, I was perplexed until i saw the part number on the bushing which shows up as 2015-2020 wrx, sti a few others it is 20204VA000 the bushing.