Subaru OEM Navigation discs

I'm looking for a later version of the Subaru OEM navigation unit discs. I have 1.1 , the latest version is 4.1 I would be interested in anything close to 4.1

 

General Navi Site:
https://mysubaru.kenwoodusa.com/

Direct link to the site:
http://store.kenwoodusa.com/catalog.php?cat_id=S19

This is the site we use for customers buying the discs. We as the dealership, can NOT order the discs for some reason.

 

Thanks Brian, I guess I was hoping someone had some extra used ones or something. Spending the $250 for new ones is my last resort.

 

We are looking for the disks as well... any help other than a link to a new disk would be great.