Brat head rest bushings

[65stangy]

Hi again,

 

I am putting together my jump seats one piece at a time, and have picked up the head rests and rails.  It appears there is supposed to be a couple of plastic guide bushings that slide along with the head rests up and down the rails and keeps them from flopping around.  It appears it might be fairly easy to replicate something that would work, but was wondering if anyone has a source for some, or maybe a part number in case they may still be available as new.