When you can buy pieces for $35 a POUND, there isn’t a shortage.
http://www.mammothivory.info/p.aspx?p=249
No shortage until the low price of the finite quantity raw material causes the bulk of the supply to be exausted. After that the price will skyrocket and what is left of it will be depleted even faster as speculators buy all they can get to make a quick profit due to the increasing rarity.