I am looking to order Passion Fruit flavored Fanta.  (Fanta is a soda
line produced by coca-cola)  I want to order a 6-pack, delivered via mail to
North Carolina, for no more than $30.

Info to start you out with: This is a rare soda that is not really
sold in the U.S. as far as I can tell, but is sold in other countries,
particularly in Africa.

HI, 
This advanced search on the Coca Cola website shows that Coke does
make a passionfruit flavored soft drink under its Fanta line:

http://search.coca-cola.com/cokecorp/query.html?qt=passionfruit&dt=an&nh=20&rf=0&lk=1&ws=1&col=cokecorp&charset=iso-8859-1&ht=0&qp=&qs=&qc=&pw=100%25&la=en&qm=0&oq=&rq=0&si=1&go_button.x=22&go_button.y=6

You may have to search within the coca-cola.com website with  
passionfruit  to access the info I found.

Decades ago in Australia there was a canned soft drink that I think
was called "passionola"  (complete with the little black seeds),
delightful.  My search s for it were interesting, but not for your
question:

http://www.cocktaildb.com/ingr_detail?id=345 
http://www.nctimes.com/articles/2004/05/07/news/community/20_28_065_6_04.prt

I hope that by contacting "Coca Cola you can discover where you can
buy or order the stuff.

I found the site for the company that is the importer for the Fanta
line from Argentina. I hope this helps

http://www.retek.com/press/press.asp?id=214

Another helpful idea:  Try searching google for "Fanta [passion
fruit]" where [passion fruit] is the name of passion fruit translated
into other languages (use babelfish.altavista.com for the
translation).

I thought I might be getting somewhere doing this, but without any
foreign language knowledge, I couldn't navigate the websites google
returned.