ADXStudio v6 Licensing Renewal (OnPremise)

Hello,

We are transitioning off ADXStudio v6, but we need another license renewal to see us through the next few months.  I've attempted contacting the old email addresses we had - MaintenanceRenewals@adxstudio.com

We haven't had a response for several months.  This morning I tried calling the US Dynamics CRM Sales team (from Australia) and didn't have much luck - not sure they knew what I was talking about.  I understand that from the below article that we are unsupported, but would have though someone would be happy to take our money to give us another License Key.

https://support.microsoft.com/en-us/help/3165165/legacy-adxstudio-portals-and-microsoft-dynamics-365-portals-supportability 

Any guidance on next steps would be appreciated.

Thanks
Glenn