Are you sure that the cell is dead? I had two Canon 7's that "looked" dead, but it turned out the cells were good. The Cell comes off with the top plate, and the contacts to one of the camera body had corroded. Clean it up, works great. The second had a bent "baffle" plate blocking the meter movement. I removed the baffle plate, and it was fine. I would check with some of the "specialty" shops like Essex. Henry Scherer will replace the selenium cell of the Contax, if anyone knows where to get Selenium Cells, he is the guy.