In flashlights, like are you wanting to replace the bulb in a Maglite? Just flashlights in general, or are you looking to do a specific model?
Generally, the optics or reflector are purchased seperately, so you're able to make things however you want. I'm not exactly sure what the "Plastic done around the die" part means, can you expand upon that idea?
Basically, if you want a TWOJ, just ask for a TWOJ. It's not like going to the store and saying "I want a Craftsman 3/8'' socket, part number 11243-2234." They don't just sit down and make a thousand TWOJs, I don't think. I'm guessing it's like making a lot the other electronic pieces. They're mass produced, but due to variations in the manufacturing process they can come up as all kinds of different things. There's probably a nice way for the manufacturer to sort them, hooking them up to meters or something. You'll find if you buy many of the lights out there, the Luxeon range in the EXACT SAME LIGHT will be pretty vast. We call it the "Luxeon Lottery", because you buy a light not really knowing what you're going to get. My QIII, for example, has a whiter hue than my Surefire L4. It's all in the luck for the most part, unless you buy a light where the luck has been taken out of it. These lights are usually fairly custom and highly prized amongst collectors, and are thus fairly expensive. .
