I bought this one and thinking about doing the mod on it
UltraFire 6P 7.4V Tactical Xenon Flashlight Torch Set - eBay (item 390305658862 end time Aug-10-11 20:07:15 PDT)
I'm not seeing any specs for the size of the zenon module. Get a pair of calipers and measure your module. 26.5mm wide x 29mm long should be swappable.