A professional from Gettysburg, PA says:
March 11, 2016
Please let me know if you can provide replacement moldings or who I can purchase this from. I have not been able to locate in any catalogs.
Paul from SWISCO responded:
March 14, 2016
Your vinyl snap in looks like the handle section of a sash. Look at our 55-188, which is a glazing bead with lift rail for a vinyl sash. Could that possibly work for you?