The 5d2/7d 3rd party batts usually comes with their own 3rd party chargers. ( i believe canon made it such that all 3rd party batts cannot sit on their chargers ) Try search phottix for their own charger for the batt ? ( price not sure, but usually way much cheaper than the original )
Hi , Am surprised that the person that you bought the Phottix battery from did not mentioned to you that its not compatible?
Anyway, you can go to red dot photo to purchase it online. I do not know if they sell the charger seperately but its about $35 for the charger and battery.