I would like to second the recommendation to find parts suppliers that have original parts warehoused. Also, I deal with Bert's a lot and they are good people. If you go to
www.modelastore.com, you will find their online catalog. The descriptions for various parts will let you know if they are made in USA or a good import. If you want original parts, you will need to email them or call them as those parts are not in the catalog online (too hard to inventory probably).
There are other suppliers spread across the country, but I live near Bert's so I have not sought out the other options.