As of 2015, some retailers that sell solar system mobiles include LandofNod.com and Pottery Barn Kids. Each of these stores sell the mobiles online and ship to the customer's home.
LandofNod.com offers a colorful solar system mobile that hangs from the ceiling instead of the edge of a crib. This mobile features planet sizes of 1 inch to 4.5 inches to help keep the planets' varying sizes accurate. The kit includes Pluto and stars that glow in the dark.
Pottery Barn Kids offers a mobile with planets in differing colors and sizes to show the difference in actual sizes, including a large, bright orange sun at the center. This set includes the eight recognized planets.