you could if all else fails, just go buy 2 new door locks and put them in your doors, you now have a new door key, but you are also not crawling through the trunk.

remove door skin, and they are held in with a clip. thats it.

and your key fob, have you changed the battery? or made sure the contacts under the buttons are clean? i just cleaned mine and im back to a 100 foot range.