Hi, @Jenael_Falcao
There is something close to what you want.
Sharing Projects To Other Departments without New Seats - English Forum / Tips and Tricks - Asana Forum
Share a project publicly - Read only - English Forum / Tips and Tricks - Asana Forum
I have heard that this can be used.
Google Sheets & Asana
Trilogi Solutions: Asana2Go
If there’s a possibility,
How about reducing the number of licenses in the current Advanced Contract by half and using the Enterprise Contract?
Because the advanced license is about half the price of the enterprise license.
It may not be exactly what you want, but
It depends on the details of your organization’s situation, so I can’t guarantee that this will apply to you.
A detailed explanation is needed separately, but I think Divisions will work.
See also this.
What I learned about divisions 
- Tips and Tricks / Forum Leaders tips - Asana Forum
User Oriented Features - Ambassador Forum / Product updates - Asana Forum