Radio shack has 'em, but the ones around where I live have had a max of two packages of .187 female quick connects (10 piece), and usually only one. It's like they get one a week or something.

More common is male & female packages, or .187 & .250 female packages. I get better results at Fry's Electronics (like a Home Depot of electronics, computers, TVs, & appliances for those without one near by).
Online is another good spot. I'm sure some of the common refered sites from here sell them, but can't remember which ones.

Maybe someone else who remembers?