Well not tack welded together. Since you asked. 4 Bolts 2 special order because of the pitch ($7.25 for all). The bolts heads are turned on a lathe and undercut the heads at a 30 deg angle. They are then TIG welded around the entire bolts. Then they are stress relieved with a torch (guy charges me $18 a set), then of course we paint them, and shipping is around $7 in a small box in the CONUS. So I would make less then $15 per set.
That might cover my effort. Had a good idea and if someone does not want to go to the trouble of doing this on there own then have at it. I thought folks might like the idea, not trying to get rich LOL.