Hey ya'll, unfortunately, my sister backed into a mailbox while coming out of a friend's driveway today, and it busted out the left tailight and dented the tailgate of her 2001 QX4 pretty nicely

. Although she will have to have the dents fixed professionally, I am hoping I can fix the tailight by myself. The lens was busted out, but there are still pieces of the lens I am guessing is still glued to the edge of the assembly. If the lens glues on, it might be more trouble than its worth and I will probably either replace the assembly or have the lens replaced professionally. What do ya'll think would be the best thing to do? And where would be the cheapest place to buy a lens or assembly? Thank you!
Here are some pictures of the damage: