Custom Calligraphy For Envelopes: Random Font - Wedding Calligraphy - Parties - Events. $3.75, via Etsy.
Incorporating Le Tricolore into a Save-The-Date for a Paris wedding is genius. Look for ways to seamlessly connect what makes your special day so special into the elements of your wedding. Bernard Maisner stationery, price upon request. For information: bernardmaisner.com
Sally Sanders Entwined Trees from Wedding Certificate
CT-Designs Calligraphy and Wedding Stationery: 8 Unique Calligraphy Addressing Options
Awesome unique font
kraft paper envelopes w/ calligraphy
Calligraphy Addressed Envelopes - Google Search
This site has a lot of great wedding calligraphy suggestions and envelope samples.