How about taking a ride to the airport and making a sales pitch to the FBO on-field? Not meaning to speak for the site owner but from what I have seen LiveATC offers free advertising in exchange for an FBO providing a feed. That, combined with a "hey, think of how your student pilots would benefit from the 30-day feed archive" could be your pitch.
All they need is a scanner, a computer, and an always-on Internet account. Typically FBOs will have the computer and Internet account already established, so it is just a matter of getting a scanner, connecting it to the computer, and configuring the free software utility that converts the audio to a digital stream for transmission up to the LiveATC server.
Then we can all hear your radio skills.