1964 dart gt restoration

My dad and I started a 64 Dart gt restoration, after restoring my Duster we have become familiar with later a bodies but are new to the earlier ones. The biggest difference seems to be availability of after market parts. Couple of questions are, where to get windshield (mine is smoked) seat covers( other than year one) tail lights. Any help will be appreciated !!! Pic of what we are starting with.