Dealextreme.com has the 2xAA extension tube for your UltraFire C3 1xAA
http://www.dealextreme.com/details.dx/sku.4438
or just buy the bundle that came with both 1xAA and 2xAA tubes.
http://www.dealextreme.com/details.dx/sku.4452 $20.50
http://www.dealextreme.com/details.dx/sku.4438
or just buy the bundle that came with both 1xAA and 2xAA tubes.
http://www.dealextreme.com/details.dx/sku.4452 $20.50