I have a few sets that look like that I bought a few years ago from Tool Improvements as well. I can't recall his name right now, but a very nice guy that answered questions quickly and was very helpful. He also made a product for the MFT called a slopstop. I do remember him posting on his website that other commitments were taking him away from making any more products for the near future. I did notice (google search for his website) that his website is down now, but he is selling the slopstop on Ebay....you might message him to see if he has any dogs left. I use 2 of these to secure my fence to the mft and got rid of the protractor thingy.....best move ever, never go out of square anymore...