The Airmen of Note have many good quality downloads of several of their recordings.  Compositions, Live, and A Holiday Note From Home are particularly relevant.

Alan Baylock has cds available on his site.  Check them out!  They're all great.

The Navy Commodores have many downloadable musical examples on their website.

Rewind Play has an audio archive with all of the Airmen of Note's recorded releases.  A great place to hear the music of Alan Baylock, Ben Patterson, Jeff Martin, Tyler Kuebler, and Rich Sigler.