I am going to cry.
Seeing Chewie like that is hard to swallow, but it is very cool!
I did post my Chewies a long while back:CHEWIES
Scroll down and there are some of the best scans I've ever done wierdly enough.
The blue bowcaster is actually a deep greenish-blue and the 'black' and regular bowcaster is a deep and dark blue when seen is good light. It came with the Early Bird Chewies for the most part and is quite rare, but it has also been reported and verified as packaged with some early 12 backs (like double telescoping sabers).
Green arms Chewie is discussed in depth in that link, so I'll save myself the trouble.
I also have eye variations (more white or more blue) and other paint variations. I'll look more and post all I have soon (think I have 3 complete and 3 or 4 without bowcaster...).
Sorry to be absent for so long. Glad to come back to this though!