Hi @SergioAtica, welcome to our community!
As this is a Global user based forum and the availability for devices and accessories may vary between regions, your best option is to get in touch with the Local support team in Spain and see if they have more information when this specific accessory will be available either in stores, or in the Xperia eStore.
You can contact them directly on the link below.
https://support.sonymobile.com/es/contactUs/
I hope that helps! 
