It's new to me!

[toych]

Robert, 3B scientific has an 18" long model for 98 bucks.

http://www.a3bs.com/spine-models/mini-vertebral-column-elastic-on-stand-a1821,p_65_57_0_0_25.html

[myxpykalix]

I tried cutting a model and it was just too fragile and too many undercuts to get a good accurate representation. I would buy a model like darren recommends and then also do like steve recommends and suspend it in resin to keep vandals from ruining it.