Yes, but not straight forward. You can get refurb keys from Ebay fully refurb with new blade. (Around £50 each). But you'll still need a good auto locksmiths to cut the blade and duplicate code (from current key) for immobiliser on your zed (around £100 ish). Once that's done, you'll need to follow procedure as pointed out by Buster above (http://www.350z-uk.c...showtopic=16896 ) to program the transponder for lock/unlock (Free)
I did all above 2 years ago, however I managed to cut and code my key in Malaysia for £25.00. I go back to Malaysia annually and took a risk of getting it done there with my original key only (No, i did not fly my zed to Malaysia). Not sure it will work at first but for £25.00 it's worth a try.........Fired up first time and no issue hence why i know the method above works, just a bit more expensive in UK.
However, few months ago. Whilst i was packing to move to a new house, I've managed to loose the spare key, doh!! Hence I've purchased another key from a breaker this time (Jon@EmperorTuning, a trader here), for £20, a new blade from Ebay for £3.00. Just need to bring it with me on next trip to Malaysia to get it sorted. I'm assuming this will work too.