I was just catching up on Low Carb Friends when I ran across a mention of a sweetener called SucraDrops. It's only half as concentrated as Sweetzfree but the price is very reasonable and they have free shipping in the US. I love using Sweetzfree but sometimes you only need a tiny bit to sweeten coffee, etc. and a single drop can be too much at times. I still have a full spare bottle of Sweetzfree in my pantry but I will keep SucraDrops in mind when I need to re-order.
You can buy SucraDrops HERE. They also sell it on Amazon but the price is a little higher and you'd have to pay shipping on orders under $35.
Bear in mind that I haven't tried this product myself yet. If you have tried this sweetener, please leave a comment.