You can get a flip key for you car. On all '04-'06 models you can get the flip key, and the flip remote for a Mz6 and they'll run you about $75 cut to your car and shipped to your door from
www.onlinemazdaparts.com. There are obviously other places to buy from, but Jason's always taken care of me.
Now if you have a 2007 and you're in the states then you're slightly screwed. Mazda changed the Keyless Entry Module in the '07 US model so that the Mz6 remote will no longer work with the car. To get around this you can replace the KEU with that from Canadian models and then get flip keys to work with that. Altogether that will run you around $250-300. That's the only way to get then in '07 (speed or regular) models in the US until another key is found that works with the new KEU.