If you live in the states, I can do that for 7 dollars total with the stipulation that It's a cube shape. Since it's plush, it would still be pudgy and function like a ball. Plus, you know, minecraft=blocks.
This price covers time, shipping and crafting materials, and the cost of etsy/paypal. If you would like to purchase, you would send the money via paypal. My paypal email is email@example.com
If you feel more comfortable with a storefront, let me know and I can make an etsy listing for you to purchase with.