Murray, you've been asking questions related, I think, to finding a way to use a backless Graphic that you bought in the hope a back could be found for it.
Someone on the
www.graflex.org helpboard (not me, alas) suggested that you could put a piece of ground glass (buy from Dave!) in a film pack adapter and use that for viewing. After, that is, you'd attached a piece of sheet something (aluminum was suggested, plywood would do as well) with the appropriate cutout to your Graphic.
Well, you can use an FPA to hold a single sheet of film too. Reload in the field with the help of a changing bag. Remember, FPAs have darkslides. Rubber bands or a simple clamp to hold the loaded FPA on the camera.