Why not knit your own?
As part of a mixed-media art project in 2010 (not related to the 31st), artist Ben Cuevas chose to use a knitted human skeleton as the centerpiece of his installation. While the rib cage may be showing the effects of gravity more than one would like to see on the average x-ray, the detail of the final project is staggering. You can find more images and information about the installation here.
(And just in case you’re not into knitting, we DO have a selection of skeletons and skulls here in the Bookstore to complete that Hallowe’en decor.)