You might try to get a copy of "Handbook of Aviation Fuel Properties"; published by Coordinating Research Council, Inc. I got my copy thru Gammon Technical Products Inc. (732)-223-1600
Includes Bulk Modulus for JP-4, Jet A, Jet A-1, Jet B JP-5 and JP-8 over the range of 0 to 100 deg. C and 7MPa to 28Mpa