I did the one on ebay. You either use the one they seond you and program it to open your car or you use your oem one and pull apart your key and use the standard one.

Make sure you put the little magnetic immobilisor thing in with the key when you do it lmao .. oh and also, dont go to a shonky key cutter coz they had to redo mine 4 times to get it right with the length and tip of the key