I'd suspect nobody would bother. The itp A6 is known to be very floody, due to Orange Peel reflector and the MC-E emitter. Therefore, nobody would really buy one if they wanted a thrower.
I think most modders would rather start with an SST-50 or other emitter that has a bit more natural throw, then add a big smooth reflector to it. Also, most of them would rather work with Maglights due to their bigger size, thicker aluminum, and easier ability to use Lithium batteries.
For under 50 bucks, you can get a Trustfire TR-1200 from DX that uses 2 or 3 18650s and 5 emitters with smooth reflectors. It has really really good throw. I think that would be cheaper than modding your itp A6 to be honest.
