b body door window to track plug needed

[icenfire]

Looking for a plug to keep my window in the track. I have spent countless hours on net searching through all the resto sites and am unable to even find out the proper terminology for it.
Just need one for my 69 RR droptop
Got one or a site to buy I would appreciate it

THANKS

 

[Car Nut]

Try Mega Parts.

http://megapartsusa.com/