Hello, I looking to replace a power board in a mod I have. I've found one (the SX 300) that looks like it will fit and as a bonus, has more power than the original. I can not find any place to buy it though.... well, without getting 50 of them. Anyone know a place I can pick up 1 or 2 of them? I also haven't found a definitive answer on one 18500 powering this, if someone knows this for sure...