A good source we have used is:
Fiber Optical Lighting Industries
950 SE M Street
Grants Pass,OR 97526
phone: 1-503-476-6900 Fax: 476-0796
We had a fiber optic night sky with all the constellations fabricated
to my specifications for our Northern Mystery exhibit in 1994. It was
used to instruct in the use of a sextant for navigational purposes.