If you click the first link in my post, you'll see that 9.Solutions has a mini version of the Savior - only 135 g.
^^ This is important. I have a ton of clamps, and it's often difficult to find a happy medium between the excellent, rock solid, heavy (450g or about 1lb) manfrotto super clamp, and lightweight little clamps.
Also, pay attention to how your t-bar attaches to the clamp. Many clamps only accept one 3/8" or 1/4" threaded stud, which is not always ideal (it can twist and come loose, so it won't fall off but your mics will be pointed the wrong way in that case)
I like the Manfrotto 386b nano clamp, it does have the twist issue unless you use the manfrotto quick connect or something with it. Voltronic's mini clamp looks good, too.