This simple healthbar possible?

I have read through the GUI part of Unity and am now wondering if a simple GUI like this is possible. It is a semitransparent Healthbar using a curved shape. The problem with it is, that it is curved and from what I have read in Unity’s GUI section the only way is to use strictly rectangle shapes for scaling and clipping. How can I implement this then?

469288--16461--$health.jpg

Look at this thread: http://forum.unity3d.com/threads/42813-Health-Bar-UI

Actually, you could do it a bit more simply that the linked thread since you don’t need to turn a corner (the top of your health meter is aligned to the axis.) You could just modify the uv of the red texture to only show the portion of the texture you need to show health.