I think that this is what you were looking for.
We made these. Steel angle pieces that had 2 slots cut into them. Then we cut off the corners, cause they looked too bulky.
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You can figure out the distance from the frame to end upright's mounting eye when the sway bar is parallel to the ground, and the uprights are perpendicular to the ground. The sway bar should be square to the frame, too.
Do this with the vehicle sitting flat & level with the weight on the suspension. PITA to do by yourself.
Two bolts are needed to mount it to the frame. One of those brackets will need a third hole in it to sit over top of a frame rivet that's in the way. I can't remember which side is the one with that.
Drilling the holes in the frame was fun. Hot shards of steel jumping down my shirt!