Found this listed on eBay and I couldn't resist.
I decided to paint it and left the dart flinging and light up function intact. Not an easy task as the parts flung out and I had to figure put how to put it back together.
Thankfully I managed to find an internal layout on Reddit courtesy of Professor Physics: https://www.reddit.com/r/Nerf/comments/55lxsc/star_wars_rogue_one_blaster_internals/
Thanks to the Reddit poster for this information.