I'm not trying to be a know-it-all, I'm serious. Why would you want just a "generic TO-220 heatsink"? Wouldn't you want it to match one that you plan on using?
Anyone could send you what they call a "generic" heat sink footprint. Unfortunately there is no such thing.
Firstly there are three general in dependant categories vertical horizontal and lateral. Which are you seeking?
Then there are several different mounding methods and vane profiles. None are generic.
You request seems to be asking for a collection of what others have made with not indication of scope.
Heat sinks are selected by requirements and thus far you seem to be asking for a solution for any/all requirements or random requirments.