The last ones were a hit so I made a few more Storyline shapes this weekend.
Here's what they look like:
I've attached the .story file containing the shapes.
And an important tip that was pointed out to me in the comments on the last shapes I posted... you can do a right-click on the group, Save as Image and then save the shapes as .PNG files. This way you can edit them as necessary, and also re-use them in other projects developed in other applications (Captivate, PowerPoint).