I have had an old Peugeot from the 70's which recently got partially stripped of its rear wheel and seat/seatpost. I have had it for a while and never noticed the size of the post, but it seems to be about 22mm in diameter. I don't seem to be able to find any seatpost of this size in bike stores. Any suggestions for where I might find such a thing, or are there seatposts that can adjust to the diameter? Any help would be much appreciated.