Repair Bent Unibody Case Mac Book Pro 15"
I could not recommend you any service, but here is my story.
I was almost the same situation about a year ago. I decided to replace the "top-case" which is the keyboard actually. I've got the old bended part and later it was easy to bend it back to it's original shape (it's really elastic aluminum) by myself.
The sad thing that the whole inside should be screwed out and back to replace the "top-case". So it's not an easy job, they even shortcut something at first time at the Apple service.
The bottom part which is just an aluminum plate can be easily bended back at home.