Hi, I have a mid 80's Peugeot frame that uses a very hard to find quill type seatpost and I need one. I was wondering if anyone knew where to get one or if I could make my own. It is a lovely frame and have it since my childhood but as I was going to do it up recently and I realised a) the bottom plate is missing and b) one of the bolts is welded with rust, wont budge. Maybe there might be a workaround with the plate. The dodgy bolt is the back one and is not that important. It was stuck even when I was riding it back then. I've no idea where the under plate thing is though. It might be easier to get a whole new replacement. Pity. I hope someone out there can help me with it. Thanks