The address labels and covers aren't offered for the TOS designs, but the other three series all get them:
Meanwhile, a Ferengi embassy would appear to have opened in North Carolina, where you can now play a new Star Trek scratch card lottery, with a card design fro each prime series, letting you win cash and tickets to a Star trek convention.
Star Trek gambling is online too! With the nuTrek game, Against All Odds, which includes three different types of game play, a slot-mahcine style round, an arcade game like battle between the Enterprise and the Narada, and then, quite innovatively, the use of the Enterprise's deflector as a spinning game! Here's a video showing all three: