Tennis ball with a hole in it will pop the lock.. not sure if alarm will sound.. youtube has a video you can do a search and find.. but simple put.. drill a (app. 1/4) hole in the ball.. place hole at key slot and "punch" the ball with the palm of your hand..

Keys on ebay are useless other than swapping your internals for a pretty outter case.. You have an rfid chip that has to match to the car.