I was looking at the code tonight to see if this could be done but since the link code is processed through the editor rather than a textfield you don't know exactly what sort of html you are dealing with.
If the creation form was changed so that you
- Uploaded an image
- Enter the link to go to
Also happy to help with this if this is considered worthwhile, or with anything else code related I can help with. I rely on this plugin so I'm happy to help make it the best it can be.