Originally Posted by xluben
Well, you have to cut the stock key open to get the transponder out no matter what. Shaping it to fit in the flip key shell is a challenge though. If you don't want to do that you need to buy a used Legacy key and the Legacy key shell/blade. The blade quality will be fine. Get the blade cut, and then swap the buttons from the used Legacy key into the shell. Then program that remote to work with the car.
yeah without the right tool its the re-shaping to fit part that sounds like it would be tricky.