Enable preset customisation of List Publisher invitation text at tenancy level

We'd like to be able to pre-customise our List Publisher invitation text at tenancy level, instead of each time an invitation is sent. We have a standard text we send to new academics with their invitation, but each time Library staff send an invitation they have to a) remember to customise the text, b) remember where the standard customised text is filed in our cloud, c) copy and paste it and d) then tweak it further if wished.

It would both save time, and be more consistent, if we could change the automatic pre-populated invitation text at tenancy level.