I'm flying into LAX Thurs. afternoon and needed a ride so I contacted a travel company to see what they had. For $130 per person round-trip, they will drive us from LAX to Coachella Thursday afternoon and then come back early Monday AM and drive us back to LAX. And they will likely be willing to stop at Wal-Mart or somewhere equivalent to pickup anything else you need on the way down to Coachella.
There's room for 6 more passengers so if you are interested in getting a ride, PM/email me. Once I have 6 people confirmed, I will call the travel company back to confirm and finalize the pickup time.