I cannot find any info either, so lets "figure" it out. Does the "bulb" look like an interchangable (replace-able) bulb - LED's "almost" never need replacing (for the most part) and manufacturers always solder them in. I'll assume that you cannot twist (or un-screw) the bulb.
Now what to do...if you really like this flashlight - you could open it up, un-solder (or cut leads) the LED and put a new one in. The LED to use is:
- one that can handle the voltage - measure voltage (with volt meter) at the burned LED with flashlight on (keep track of polarity, which wire is negative/positive for the new LED),
- you will check for a flat (fish eye magnifier) top surface or round top,
- check for size (diameter) of the LED.
Now match that up to an LED at www.digikey.com
They will have higher prices but, you are only buying 1 LED and they have the biggest selection to better match you old LED.
There are lots of new flashlights out there and getting a new one may be a good option.