Paid Gig - Need a simple menu item added

I need a new "Save" added to the main menu called Save Incremental that when pressed or when it's keyboard shortcut are clicked save a new file at the same location with incremented numbers. Example: I'm working on testFile.3ds and I use that save button, it saves it as testFile_01.3ds. I then use the button again and it saves it out as testFile_02.3ds. I know Save As Incremental is a thing but not exactly what my artists want.