Wish I could help but my gas vocer doesn't lock if the car is unlocked.

Since it's urgent try jog-lovers.org alot more people on there own the older models, most people on this site just own x and s types

 

for $600. you can't complain. try removing the license plate first, there will be 4 screw holes, using very thin needlenose pliers and flashlight, you might see the locking lever through one of the holes, try to grab it and pull up or down on it, it might get the trunk open. Very slow and tedious but worth a try.