where to buy Door regulator plastic parts?

[rnjump]

  I have a 71 charger that I am assembling. I am missing some of the hard plastic pieces found in the doors. There may be three different glides and guides. Is this a common part that an auto glass shop can find or is it a Mopar specialty thing?

[Lennard]

Try rtspecialties and chargerspecialties.

[ODZKing]

I found much of the stuff is available on line too (EBag). There is nothing that RT carries that you can't find elsewhere from a merchant that has good customer service.

[rnjump]

  Thanks guys!