Ok, this is what I did to achieve what I believe you are looking for to both my 07 & 09. I removed the safety lever and used a small triangular file to make a groove in the thumb piece. I then took an empty cartridge container, the black plastic type, and cut from it, 2 of the cell walls to utilize as stock. I super glued the 2 pieces together and rough fashioned into the shape I wanted. Next I glued the roughly fashioned pieces into the groove I created in the thumb safety lever. I continued to file and shape until I had something very similar to the safety on my Kimber. It took a while but the end result was, IMO, very worth the time spent in fabrication. If I knew how to put up a picture, I would. Hope the directions will allow you to see the process in your head. Good luck