i HAVE SOME 8X10 STUDIO CAMERAS ON BEDS THAT WERE USED ON LARGE ROLLING TRIPODS. i wanted to find normal 8X10 backs for them. does anybody have a good source who is also knowledgeable as to the options and what to watch out for. right now these cameras have huge backs on them that look like they might have at one time been used to take two or more photos on one piece of film. i guess i just need to talk to someone who has used or uses these beautiful old wooden cameras who could help me out. thanks. jerry