Anyone know where e I can get an old school pro circuit PC cover with the stopper in it to prevent my PV from binding when its fully open. I'm ready to put it back together but must fix this somehow first. Pro circuit discontinued them long ago and I didnt know this was an issue when I bought the bike a year ago and trashed one .040 piston. The ring was making contact with the PV when it was closed..desperate issue. I need a cover with the stopper in it...or make one somehow..any ideas are appreciated..thanks.