http://www.dx.com/p/ak-007-0-8-1-5v-3-mode-circuit-board-for-flashlights-11-9mm-50526#.VTqlNZMy2eM
http://www.dx.com/p/350-400ma-regulated-led-driver-circuit-board-for-diy-flashlight-1-2-1-5v-128084#.VTqlNJMy2eM
Somewhere I got some three mode 12 mm. drivers that said Tank007 on them.
I might have said something useful in Smiling Shark SS-5039 1 x AAA size flashlight, modification notes, Now 3 x 7135 with modes, on a BLF Tiny 10 board.