Heidi Campbell, the designer, did a beautiful job of creating a modern take on old style:

Replicating it with something else won't be easy, and some of the following come closer than others. It all depends on which aspects of Provence you wish to mimic the most:

http://www.myfonts.com/fonts/ingrimayne/fansi-pensle/
http://www.myfonts.com/fonts/jbfoundry/purple-line/
http://www.myfonts.com/fonts/sudtipos/feel-script/
http://www.myfonts.com/fonts/laura-worthington/number-five/
http://www.myfonts.com/fonts/bitstream/french-111/
http://www.myfonts.com/fonts/jbfoundry/old-french-school/
http://www.myfonts.com/fonts/laura-worthington/samantha-upright-script/
http://www.myfonts.com/fonts/sudtipos/la-portenia/

A Google Font that may also work:
http://www.google.com/fonts/specimen/Norican

Thank you very much. I really appreciate all these choices. Am I correct that Provence is not available commercially?

According to Heidi's portfolio site:

Since I don't see a link anywhere, I suspect she hasn't gotten around to it yet, or hasn't found a suitable retailer.