I try to have duplicate keys in the car. For the 2002 Sienna, I had the card and went out and ordered a duplicate. For the 2009 Mexican Sienna, I went into Wal-mart in Tehuacan and they had a lock kit, with 4 locking lugs and TWO identical keys. Cost around $7.50 US dollars.
When I was back in the States, I tried to find locking lug nuts that didn't stick out so far, and had no luck. To find better choices in Mexico than in the US is not something I expected. I love Mexico and want to live here the rest of my life, but one sacrifice one makes to live here is a lot less consumer choices.