If you can't find the decaf jasmine tea you seek, I offer an
alternative.

If you have a local middle eastern market, or a market that carries
middle eastern brands like Sadaf, you can find something called "orange
blossom water" that's used in flavoring coffee, tea, and dessert. Its
fragrance and flavor are remarkably similar to sambac jasmine. You can
also get it online at http://sadaf.com/store/EssencesExtracts.html

Find your favorite decaf green tea, brew a cup, and add a few
drops--just 1-2 drops as it's very strong stuff! I made the mistake of
putting a capful in once and it was like drinking potpourri, so use it
sparingly. One bottle should last you a decade or so at that rate.

If you find this isn't an acceptable substitute, you can visit your
favorite nursery and buy a sambac jasmine plant, preferably a
double-blossom varietal. They do fine as indoor plants, and if you live
in a warm climate, they do great outdoors. Mine blooms all year round
in California! One fresh blossom works great!