Hi ajnagy,
I recall that in Nelson's Petroleum refinery Engineerg,are a number of crude esaays listed in the back,I can check if it has Penn's crude..
I just spoke to the people at Petroplan(a refinery simulation software) ,they have a wide range of essays,but I think you have to pay for it..
Let me know if you require me to check Nelson,and e-mail me at :
wayil@hotmail.com
Regards,
whylie