Looking for amateur sax quartet to play original composition in Rockville, MD

Hi! I belong to a couple of composers societies that hold regular concerts; so I'm looking for a sax quartet group that would like to perform a piece I wrote, titled "A Day at the Park". You can listen to an MP3 file of a synthesized rendition here:
http://www.wonderful-music.com/music.html#Saxophone Quartets

The concert dates are during the spring of 2008 (or later, if you prefer).

thanks!
--David Rubenstein