Key that isn’t the insert in the fob?

26 6MT Limited

I am looking for alternative to the emergency key that is in the fob. I do a lot of short stops or have my dogs with me, locking the car to keep it running with A/C with the insert is getting old.

I saw some key blanks for older Subarus that look similar but I’m not sure they would work. I’ve been getting conflicting information when trying to research this.

Does anyone know of a key blank with an actual head that I could have cut?