In order to install a 360 view module and cameras it's necessary to change the car as-built, No Mazda dealership in the world would touch the original vehicle as-built after cars leave the factory floor.
It's possible to do the job yourself with Forscan a free software but it won't do camera aiming and register the car VIN # into the 360 module for these two procedures it needs IDS.
To complicate things Mazda is moving the whole lineup from IDS to MDARS, no free tools for that.
I've read from people they've done it but they encounter issues, search in Mazda3revolution forum .
Enter your VIN # here Japan As-built search engine if you get data back to download your car is in the old IDS system and Forscan can be use.
Yes, is going to be pretty expensive and very hard to locate all parts, IMO not worth it.

 

Perhaps something aftermarket like this might work. No experience with it.A second display though..