There are a number of mp3s that may help with our memory work: From Steve Green's Hide 'Em in Your Heart Vol. 2, there's Matthew 6:19-21 and 6:25,26,34a. Seeds Family Worship also has Matthew 6:20-21 ("Treasure" from Seeds of Purpose) and 6:31-34 ("Seek first," also from Seeds of Purpose). If I'm doing my math correctly, that doesn't leave many verses left without music! Nice.