Funny thing is, despite my advice, a couple years ago the bulb in my Vector burned out and I replaced it with one I bought off of Ebay for a few bucks. It's still going strong, though the battery I think has seen better days.
It was a PITA to replace the bulb and I wont do it again. When either the battery or the bulb goes this time it's hitting the garbage can. Something rattles in the light now as well, not sure what plastic piece that might be. I might just take it to work to use as a backup light.