I'm having a difficult time figuring out which Polaroid back to use with my 4x5 camera. I'm planning on purchasing expired film, such as Kodak Ektachrome 64T but I have no idea which Polaroid back will accept it, or how I can even figure out which Polaroid backs take which slide films. I've heard a lot of suggestions saying to go with the 545 because of Fuji film, and I would go with it except I'm not entirely sure if the 545 backs ONLY accept fuji film or if they will accept other kinds as well, such as the Koda Ektachrome. Any help with figuring out what Polaroid back to use and what kinds of film it accepts would be very grateful. And if there is a universal back, then that would be even better meaning I can just use all types

P.S. I own a Graphic View II with Graflok back, just in case I will need a specific Polaroid back that will fit on the camera.