yes, they do come from the innova pro shop. the amazon link does look kind of sketchy but i just ordered two of them last week. I got a really great swirled orange one and a blue one, and the shipping was free. The only thing is you obviously dont get to choose the disc.
https://www.amazon.com/gp/product/B0868SF5RR/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1