A lot of places do t stock/list a compatible battery as it needs to be start/stop compatible.
I have a new one in the garage that was fitted to my Mazda 6 for a week before I part ex’d it.
I can take a pic and get the park number if you like?
One thing to note is ideally you need to get it fitted by a garage as they have to tell the car it has a new battery as it charges new batteries at a different rate to older batteries (apparently)