i have one and i dont use it...its dumb cause it changes color when you put it on..it turns into a pink/purle color...actually now that i think of it i've had 2 different blue lip sticks or lip glosses...=]
try cover girl thats the brand that has the one i bought.
You can try a costume shop because most stores will not carey such an odd color. If that doesn't work, don't be afraid to mix eyeshadow and vaseline, it'll create a tinted blue gloss. That should be your last bet.