The Libertarian Party of Dallas County has high-quality T-shirts, white on blue, with the LP name and Statue of Liberty logo on the front and the national 800 number on the back. Now, it was a few years back when I got this information, but the shirts were way cool. Try contacting Odis Ellis at (214) 690-1127 for more info. If they're gone, sorry, you missed out.
Liber-Tee Wear
has an online store letting you choose a liberty-oriented quote and
have it put on a T-shirt of your choice.
You can find every flag you might possibly be interested in,
including the First Navy Jack, Culpepper, and
Gadsden "Don't Tread on Me" flags, from
The Ultimate
Flag Source, a libertarian-owned business, and from
Flagdom. Flags are available
in a wide range of sizes at reasonable prices.
Frank Worley has a collection of libertarian-themed rock/roots songs
Audio Forum focuses on language tapes, but also has a wide selection of other audio tapes including ones on libertarian subjects.
Knowledge Products.
Left Justified has shareware about historical documents such as the Constitution.