Just got this in from Game Figures (Minifigs), and thought you'd like to see it. (I don't think it's even on their website yet.)
![PzKfw IV Raketenwerfer PzKfw IV Raketenwerfer](showcase/ww2landshowcase/2007/544961a.jpg)
It's marked as a PzKpf IV Raketenwerfer, and I've propped the pieces in place so you can get an idea of how it'll look when assembled:
![PzKfw IV Raketenwerfer (front) PzKfw IV Raketenwerfer (front)](showcase/ww2landshowcase/2007/544961b.jpg)
![PzKfw IV Raketenwerfer (front-right) PzKfw IV Raketenwerfer (front-right)](showcase/ww2landshowcase/2007/544961c.jpg)
![PzKfw IV Raketenwerfer (back-left) PzKfw IV Raketenwerfer (back-left)](showcase/ww2landshowcase/2007/544961d.jpg)
![PzKfw IV Raketenwerfer (right) PzKfw IV Raketenwerfer (right)](showcase/ww2landshowcase/2007/544961e.jpg)