Here ya go

http://www.firepowerpinball.com/   - go to FP artwork and you will find your treasure 

I have printed things like this onto a decent 'card/ photopaper'
It still isnt thick enough to go over the rivet.
So cut an extra blank piece ( the same size/roundness as the front sticker ) and cut a hole in that back piece for the rivet , then stick the front decal print to that ( the back piece will bring the whole face of the target up to be the same level as the rivet ) - make sense

Dont forget to go around the edge and colour it the same colour as your target so it blends in nicely