You can work with stacked balloons. Manually a headache since SW is unpredictable with placement, even if you shift drag it. You also need a border so your best bet is add it via API.
Manually you can remove the border but the text will overlap. To add more balloons simply window select or ctr select the individual balloon items then select a new component and hit crt-V. Now drag the newly created balloons with shift and stack them again.