I have the PFE and HFC property calculator from 3M. Unfortunatly it has NA under many of the vapor properties, go figure. Here's a contact I have on this spreadsheat at 3M:
Lew Tousignant of the 3M Company. He can be reached at 651 736 5242.
He might be able to supply info, 3M's web site is convoluted at best.
Brian