I may be late to the game on this solution, but my recently lost van keys taught me a lesson. Replacement key, with mandatory chip coding, is $170.00. And the vehicle has to be at the dealers for whatever reason, so if it can't be driven there, it must be towed in. I bought a small name tag that fits on my key rings and listed my cell phone, hoping that any future finder of lost key will call me. Those small tags are 3 for $1.00 at Walmart or Lowes. After getting the replacement quote, I searched a lot harder and finally found the missing set. Parts manager said some makes can cost $400 for a new key.