I've acquired a very beaten up Rolleicord 2 along with a much nicer Rolleiflex Original which I'm hoping to try out soon. The Rolleicord mirror was very poor, and was clearly a replacement as it was silvered on the rear surface rather than the front, so I decided to renew it. The only time I ever tried to get front silvered glass from an old Polaroid camera, as is often suggested, ended in frustration. I couldn't even get the mirror out in one piece, let alone cut it to shape. I began to wonder if a better alternative might be available nowadays. A local plastics supplier showed me some Silver Mirror HIPS Sheet (HIPS = High Impact Polystryene Sheet) which is silvered on the front, but they only had it in large expensive sizes. An internet search revealed a source of A4 size 1mm thick sheets, and I bought two of these for a very few pounds. Upon arrival I was disappointed to find the 1mm material probably too flexible for what I had in mind, and also carrying a slight natural curl. But then I had the idea of cutting out two pieces and gluing them together back-to back, both stiffening them and hopefully, cancelling out the curl. The material has a protective film on the silvered side, and is easy to cut to size with a craft knife. I cut out two pieces the same size as the old mirror, stuck them together with a thin layer of impact glue, applying pressure with a heavy book until it set. Then I peeled off the protective film to reveal the shiny surface. The resulting 2mm thick mirror was just about the right thickness, but it still didn't look optically flat enough. However I installed it in the camera, and refitted the hood and ground glass screen – in use the slight unevenness did not seem apparent, perhaps because of the short distances involved. It seemed to sit more evenly without the springy "frog" which normally sits behind these mirrors. It remains to be seen how well it performs in practice. There are a few more issues to resolve with the camera first.