Here are a couple New Old Stock sites I have used. If you have the correct part number the Vintage Parts site is good. The Arizona guy is more amenable to helping you find things as long as you aren't totally in teh dark and become more work than he makes off selling you the thing. Maybe these sites should be saved somewhere?
http://arizonaparts.com/MoparPartsAll.aspx
https://www.vpartsinc.com/