artist.getEvents image for show, not headliner

at the website of The Devil's Blood (Shows page), I pull all the events of Last.fm with the artist.getEvents API.

The image in the XML is only the event image when the event is a festival, on all headliner shows the artist image is used, which, as you can see, results in many of the same images on the page.

I would like to get the (option to use the) event flyer for headlining shows as well, for instance like on this event in Germany.

Would it be possible to add the option event image (and maybe also headliner image) to the API?

Thanks in advance for answering!