Skewb ball is done. Mefferts beach ball is one of many.
Mass producing a puzzle isn't cheap or easy. "been there, bought the t-shirt" never again. It's not as easy or as cheap as you think. Not chastising you, just a comment in general.
I've done my try. And in 50 years you all will talk about finding that lost container of Rox's puzzle
I've learned through my friendship with Uwe that there is a reason some puzzles aren't produced. They just won't appeal to the masses many on your list might fall into that category.