Custom Pro Sites Message for non-pro sites users | Support System Plugin

Hey there

I'd like to be able to customize the message which shows up if a non-pro sites user tries to access the "tickets" page on the main sites's frontend.

I don't want to be non-pro sites users to be able to create tickets. this message sends them to the main sites backend where they still can create tickets without pro sites status.

i'd love to see the functionality to customize this message maybe from the pro-sites general-settings page if Support System is activated. I would like to tell Users something like

Sorry, Support is only available in LEVEL.

Wouldn't this be awesome?

Thanks in advance!
Best,
David