I would love to be able to use my own script/template when doing just data (not having the compliance option) to select what fields I want to mask and the format for how I want to mask them. I will explain more.

When doing a data deployment (data seeding) to our developer sandboxes, I would like to be able to use an external script/template for masking data. In my script/template would like to be able to set the format for the masking and how much of the value to mask. For instance maybe I want to mask a phone number from 243-456-9874 to be 456-342-0000, allowing us to preserve some values, but have them re-arranged. I would like the same for emails and any other field that I might want to include in my script/template.
We would need to know that the script we would need to load, but having the ability to set or own format for masking when doing data deployment to sandboxes would be nice.