Unfortunately, that's not really possible. The purchase button is tied to the products themselves. So even if you add the Super Widget to a widget area on your custom post type page, it's not going to show the Buy Now (or Purchase Tickets) button. They concerts would have to be created as products in order for this to work.
I can add this as a feature request, but I wouldn't have a timeline for when/if this would be implemented.
Let us know if you have any additional questions.