I ordered some small bags from a company in FL. They have an [bleep] store. Great quality. I bought a bunch of different colors for different things. Red (FAK) orange (fire), green (shelter), blue (water purification), grey (kill kit and misc)
If these are Granite Gear sacks, I use them, too, and really like them. My main use for them is keeping hunting clothing organized in storage (socks, gloves, base layers, etc.), but they'd work just as well in a pack. Kifaru pullouts are another favorite, or their Mountain Ridge counterparts.