I've searched for the photo.. but cant find it, sorry. Basically it was just a short piece of flat steel with a hole drilled in each end, one end bolted to the seat rail, the other bolted down into the factory hole. Not ideal, but it was adequate.
Ah sorry.. just one more thing.. the driver seat will be bolt right in.. if you are using the 60 Series 3/4 Passenger Bench, ONE bolt hole will be out by a couple of inches.. I just used a bit of metal plate to pick it up. I'll try and find a photo later, its the rear inner hole from memory