Dude.... Oracle is not going to redistribute a OS that requires licensing from Microsoft. Did you notice there isn't any thing but Oracle Linux being redistributed?
You don't need a template to install a windows.
You can install windows on Oracle VM Server, but no template with windows.
- you should import the windows.iso file in the repository
- create a VM with the type HVM or HVM, PV Drivers ...
- Install a windows
I hope this can help you