Where can I buy lab-grade Urushiol?

I'm looking for Urushiol oil (which is the allergy-response causing chemical of Poison Ivy) for lab research purposes - mainly testing the effect of poly phenols on shielding it from oxidation.

Is there anywhere I can find some Urushiol and order it? I've had trouble looking, as it is a possibly harmful agent. Is there any way to get some? Would I need to order it through my biochemistry research department?

Thanks! (I promise I'm not trying to kill anyone!!)