The Discmania CD3 was released in 2017. It is between a CD2 and a DDX. It has been somewhat replaced by the Enigma (+1 on speed) and the Mentor (-1 on turn). The CD3 has become a bit hard to find, your best bet is probably eBay.
If you can’t find the disc you’re looking for on sale, your best bet is the eBay links. They tend to have the most variations in sizes, stamps, colors, wear, etc. They’ll take you directly to the search results for the disc listed on this page.
Links to buy on this website are affiliate links to Amazon and eBay. Make sure you check the descriptions carefully before purchasing. DGD is for informational purposes only and is not responsible for transactions made outside of the discgolfdojo.com domain.