Help! Wiper pivot stud broken

Still thinking about this... We have the one good stud. and we have the center hole to utilize. So we might go to some effort to fashion a good hold down underneath the horse shoe shaped piece. Then we could attempt to knock the broken stud out.
How they attached the studs to that plate is the unknown. Stud has a large flat button head but I don't feel a weld on it. Stud might have a knurled section like a wheel stud but the plate is sooo thin, there wouldn't be much hold. maybe it has a square section and staked into the plate in the same manner that they staked a similar button head stud in a thin fiber board placed on the back of the thermal gauges. We just don't know.
In the grand scheme of things, finding a replacement donor stud would be like hunting hens teeth. We still need to hand broach a square hole for a alternate stud ( carriage bolt ).
So all the above is just bypassing the drilling.
Where is the guy with a scrap cowl on his bone pile ?