You'll need to purchase a dedicated 18650 battery charger. No one is going to build a combination charger. AA/AAA and 18650 voltages are too different. I have and use 18650 batteries. I now detest AA/AAA batteries. Protected 18650 batteries are wonderful. You never need to worry about charging or discharging too much. I wish everything I had ran on 18650 batteries. I use this one.
http://www.dealextreme.com/details.dx/sku.1251