Lost 2005 Toyota Corolla transponder chip encrypted key. Now using the only spare. Suggestions?

General Discussion
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I just bought a new key for my 4runner. The original broke off my key ring. I went to a local locksmith. He has two ways of doing it…

  1. Make a new master key. Doing this disables the original key. And he needed both my keys to reprogram the system.

  2. (The option I chose). Clone my original key. That way my original key will still work (I can use it as a backup). And he only has to program the new key.

Dealer cost is well over $100 and only option 1 is available through the dealer…The locksmith charged me $65.