Where to buy where to buy 1 1/4" length x 6/32 thread screws?

[speedyzeth555]

I searched google, but they all say 1/4 inch, not 1 and 1/4 inch. I bought a Corsair Hydro Series h105 Liquid Cooler, but lost one of the screws. It fell somewhere in the case, but when I rattle it, I can't here it moving, so IDK. Should I look for it? Because I'm scared that something will short out. Also, I here kind of a crackling, popping noise. Not loud, just a tiny noise. Anyway, where can I buy a where to buy 1 1/4" length x 6/32 thread screw? PLEASE ANSWER

 

[USAFRet]

Any hardware store. But you really, really need to find the old one.