When I had my FRST I made a set like this with rose joints and from welded sheet steel. They were indeed quite simple to produce and allowed geometry to be set BUT were weak and no matter what we did couldn't improve a modded Ford standard part , pressed steel.

I certainly wouldn't want to make anyone else a part like this for a 'performance enhancement' without a full test to clarify its strength and to stop me from being put in prison when someone driving it has a failue or injures someone else because of a part failure.