I have been wanting some specific kinds of ball weights--like the one seen here--so I contacted Vunter Slaush who makes great products (see the list I used here). He agreed to make them and also agreed to let me create an image for the product which is live now. highly recommend if you do 3d art. But I also thought you all might like the image.
here is the link: https://www.renderotica.com/store/sku/70709_Load-Stretch