Just found this new line of gorgeous cardboard cat scratchers from German company Cat-on. There are so many different shapes and graphics to choose from, the selection is almost endless! From what I could get translated on the website, it looks like the company offers custom graphics, and, as you would expect from a German company, the production is extremely eco-friendly.
It looks like prices start at €17.50 and go up to €299.95, which includes free shipping within Germany, but I can’t find costs for shipping to the US. Thanks to Mei for the find.