My only key broke in half. Recent M30 purchase. Where & how canI get a replacement on 1991 Infiniti M30

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Don't want to pay a locksmith $185 to rekey ignition. Broke only key in half!Replacement?
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If you don't like the price, find another locksmith or a Infiniti specialist. Good luck.
Here's a directory link for you:
I went to a good True Value hardware. Attendent put two pieces together and cut me another key...simple and I saved $185. Use tweezers to pull out stuck key and piece together!!