Shoot them an email explaining what you want and they'll have you meet the 5 license minimum for volume licensing by buying a Windows Pro License a Windows Enterprise Upgrade license, and 3 user cals which are cheap. They'll put your name down as the business and then you're done.
Use https://www.microsoft.com/en-us/solution-providers/ and pick one of the companies in your area. It largely doesn't matter.
Shoot them an email explaining what you want and they'll have you meet the 5 license minimum for volume licensing by buying a Windows Pro License a Windows Enterprise Upgrade license, and 3 user cals which are cheap. They'll put your name down as the business and then you're done.