I have been looking for ages for a back to use on a rollie 6008 or hy6, through my research, something like a Sinar 54LV or 75LV would be ideal. I am not too concerned about how it looks cosmetically, as long as it functions correctly I will be fine with it. I might also be interested in some of the old imacon or hasselblad backs with interchangeable mounts as well. If you have something, let me know what you would like for it. I am located in the US.