The way I made my "jointer fence" was with a leftover piece of 3/4" plywood. I cut it to be about 2" longer than my table (and about 4" wide), making sure that I had a factory edge on it. Then I plunged a hole in it with the spiral bit I intended on using for jointing on the factory edge. I set up the table saw to rip a skim (about a sixteenth) along the edge just to the point where I had put the hole. The radius of the saw blade prohibited me from totally completing the cut, but a couple of tender strokes with a plane, and it was ready to go. I simply clamp it to the table. I marked "infeed side" on the section that I had skimmed, just to avoid any confusion. My cost: a scrap of Ply.