I had to do this on a recent project. I just wrapped the slider in a container along with a couple of components at either end to hold the + and -. A bit of CSS later and they all looked like the same component.
Please post questions in the correct forum. When I originally answered your question I thought we were talking abou ExtJS, not Touch.
I didn't require the label in my use case but I can see how that would be a problem. Off the top of my head I see no reason why this couldn't be done by wrapping it in a FieldContainer rather than a normal container. No idea about Touch but I imagine it's similar.