Larry Clinton At Frankfort, (Central) Indiana
I purchased a jig several years ago from either Rockler or Woodcraft in Indianapolis - can't remember the brand, as I recall it was in the $100 range new. I do remember it required quite a bit of rework to make it run true to the saw blade. Took me a few hours to modify it so the face of the jig was perfectly parallel to the blade. It has worked perfectly since then.
Adjustments are coarse, so does require setup and measuring with scrap, does hold fine after setting. Doubt there is much difference between brands, but maybe the older Delta's wouldn't require the rework I had to do to mine.