Use the margin page from a broker that offers them all, The overnite is set by the exchange so all brokers will show the same #.
CAC40 is on Matif, 3125
Eurostxx50 is on DTB, FESX, 2822
mini CL appears to trade on the NYMEX, not CME, QM,2700
Schatz on DTB , FGBL or FGBS , don't remember...