Anyone know where I can buy this bulb i took it out and it’s broken

 

Pic pretty fuzzy. Is this a complete light assembly or is this a 12v grain of wheat bulb in a socket. I have bought the latter on EBay before; several sizes are available, sold by diameter in mm. As a matter of fact, I have about 40 - 4mm rolling around here somewhere.

 

grain of wheat bulb

you can find them at the hobby store as they are a common part for model trains

 

I’m going to assume you are talking about the ignition key light not the door key light. See the picture below:



That light bulb is still available for less than five bucks at any Mazda dealer: