Hey John,
There is nothing available on the market today that is the same as the old sail trax (unfortunate because they work quite well). I think I know what trax you're referring to (the stainless plates with the dimple, one for each side of the mast? two screws for each plate). I had them on my '81 I bought brand new.
I'd use masking tape and put both sides on about 3/4" below the very top of the track opening, eyeball it and when satisified mark holes and drill. Make sure the dimples aren't too close together or the bolt rope wont easily slide past them. For hardware I'd use S/S self tapping with a dab of silicone on each.
Now, all that said, no one uses sail guides any more. Just make sure there are no sharp edges in the track entry point and if there are clean up with a file. But...how many sails have you seen with the cloth torn in the first panel at the bolt rope, undoubtably from ATTENTION drawn away FROM feeding the sail into the track TO yanking on the halyard to get the last two feet of sail up