Brand new key and remote will cost you 175.00 i can cut the key but you have to program the remote portion, and get the key itself programmed at a dealer or a locksmith.
43 for the key 132 for the remote. I'll even throw in a few batteries for you. i have them on the shelf and can ship right away. shipping i think is 13 bucks. visit my website "bestmazdaparts.com"

 

My wife lost both keys within a week span. We got new/used ones from keylessremotewarehouse.com all you need is the FCCID on the back/inside of the key.

 

I lost mine over a month ago and i have hired locksmith bronx to make a new key and they charged me really fair for it.