Found this free STL online which I printed out at about 5" across. It's very fragile but nicely detailed with enough surface texture to be brought out with a bit of light drybrushing.
I also added a LED filament as a laser beam that doubles up as a support - couldn't find a purple one so painted a white one with transparent purple. The filament has both connectors on one end, so the other end was simply glued into a hole drilled into the shadow. The base was a quick 3D print big enough to hold the battery box and had an angled hole to hole the filament at the right angle.
) Great job! Loved the show! 
