If you search for sn on y, the first thing to come up should be a website that sells all kinds of chemicals, it's like a wikipedia page for it and you can put in an inquiry to various suppliers. Most of them are from China and I'm 100% sure I got scammed but we'll see in about 2 weeks. I paid through PayPal so if it doesn't come I can hopefully dispute the charge. But as for price, you're out of luck because these suppliers charge a lot more than dmc, though maybe you could try haggling, but I wouldn't be optimistic since even if they did lower the price it won't end up cheaper than dmc. I know people have bought it for cheaper but I don't know how they did it since they aren't supposed to tell.
Though your's may be cheaper than mine because you're in europe whereas im in the us.