Alright... I'll give up my source just to help you guys out.
Here's the link:
I just got off the phone with Pat, and he said they only have about 100 lbs of WC-872 left.
He is not getting anymore.
They are replacing it with H-868 which is a tad bit faster than 872.
$40.00 for 8 lbs, plus HazMat fee.
If you are in a bind and can't get it from him, I may part with my 100 lbs stock pile.