2 Remote Key Questions

[Sbelangia]

Ok so i have a 91 Lexus LS400and the ignition was getting choppy to turn---i first bought a new key from the dealer and it kinda fixed it----recently it left me at the grocery store and i bought a used ignition. Really kinda sucks because now i have a key for doors/trunk and one for ignition. THe Key i got w/ the ignition is one of the remote keys though which my old one wasnt. Unfortunatly it is missing half the key and battery. I called Lexus dealer in Raleigh, NC and they said i cant just get cover and key was 200+ but to get a key is tough, need like title and birth certificate...lol--- Anyways anyone know somewhere i might could buy the half odf the key? my other question is can I get the new key to run the lock/unlock on mine? Thanks for any help

[SKperformance]

You should have gotten a locksmith to key pin the new tumbler with the old one before installing the new one.

I would find out how much they want to do it as that would be the best solution.