Claudio you can still order from Tru Turn spinner I think by the end of the month before they stop making them. These are a bit pricey-just got two and an adapter for just over $100 but a very nice product. Also I get quite a few nice carbon spinners off eBay from ZY hobby in China. They can be had in two or three blade configurations. I get a few without slots and cut what I want.
Dave