Again, I'll recommend calling up OpticsHQ and asking for the CPF discount. No harm in just getting a quote. :shrug: I have always been pleased with their responsiveness and service.
If you live in the States, I'll second Carrot's recommendation for OpticsHQ. If you are located elsewhere, Lighthound.com is a great guy to do business with.
I just recently picked up a G2 from BatteryJunction.
Cost was 42.15 shipped via priority mail and it included
4 new CR123's plus the original 2 Surefire batteries already
in the light.