Dixie Gun Works carries it.

http://www.dixiegunworks.com/product_info.php?products_id=2075

Jerry Eder runs Flintlocks Inc. out of Nineva. He sets up every year at Friendship, and you can get it there.

OR...you can make your own with water soluble cutting oil and Murphys Oil Soap and water.

I may have some oil left, G....let me check tomorrow. If I do, you can have some.