My roadster I am picking up Saturday only has one key and the fob looks terrible. After reading about taking apart the fob and replacing the case, I read that the transponder has to be the actual transponder frequency to work. Can you not use a clone machine for the XF? The price for a replacement key from Chrysler looks to be about $150. If I cant use a cloner, I was thinking about removing the transponder from the one good key and attaching inside the column close to the antennae and just getting a few new cases from Ebay and a few of the used circuit boards for the lock/unlock buttons and putting together my own. I can cut the physical part of the key blade myself. Besides the obvious problem of disabling the security of the transponder, what am I missing here? I can put together 7 or 8 "new" keys for $150.