How to buy Norton 360 for Gamers when you already have a Norton account

Hello, I just found Norton 360 for Gamers.
I didn't know it existed, I would like to buy it but NORTON tells me that I already have an account with NORTON and that I must ask for help!
Could someone tell me if Norton 360 for Gamers actually exists? And how to buy Norton 360 for Gamers when you already have a NORTON account.
Thank you .

[Edit: Clarified the subject]