Before you bend it, I have at least 1 spare, maybe 2. I think another option would be to cut the arm length, shortening and straightening it, leaving you with the foot tab, and allowing the spline.
If you want to use some spare wire or something simple, test fit a few ideas. If you come up with something, let me know. I could cut, re-weld and then send one along to you to try. Hate to see you hash up a stock piece if I have spares that could suffice.