They don't sell the parts for the small bodies separately that I know of. You might be able to find a second hand one for parts though.
It's all about Hazel!
"Space.... the Vinyl Frontier. These are the voyages of the Starship Obitsurprise. Her 1/3rd scale mission: To seek out new plotlines, to explore the Whole Apartment - To Ball-Jointedly go where no doll has gone before!" -- Swan