I would like to rebuilt my Lockheed LR17814 remote brake servo for my Volvo Amazon Combi from 1968. I think the Rover 3500 single brake system has the same one, or at least they used the same reaction piston. I can get the new seals and other stuff, but I also need another reaction piston. Mine fits a 3/8" or 9,52 mm bore (see foto). I ruined mine when I pulled it out of the bore. I am looking for a replacement, a used one because you can't get them new anymore. I am hoping somebody here can help me out! Thanks in advance!