How to replace bulb in garrity stainless steel pen light

I have a Garrity stainless steel flashlight that is approximately 6 inches long. It uses two AA batteries. The light is turned on and off using a push button on the back (push on, push off). The head-end turns to "focus" the light. The lamp, itself, is incandescent. It is 9/16-inch long, including the two 1/4-inch wire leads. The flashlight was purchased 11 years ago, and the lamp just burned out. When I called Garrity, they said they no longer had replacement parts for these flashlights. Which is strange, given you can use Part 2A001 Mineature Bulb G1.27 Base bulbs available from Bulb Town in Jacksonville, FL, as replacements. They work like a champ! If you have any questions, ask to speak to Melinda.