Anybody know how to find a replacement for the one of the vertical, locking, aluminum window frame pieces on my 1985 2850 Command Bridge. It's the "outside" window that has a channel that the thumb lock on the inside window goes into. It's important because without it there's no way to lock the window. Are these generic or Bayliner specific? Is there an official name for this piece (when I search for the part) or is there a part number?