Timbuk2, Park Tool and Chrome all make tool rolls. I think they sell some stocked with tools.

For my daughter's bike, I bought a zippered, pistol pouch and sewed velcro loops on two sides so it attaches to the frame in the main triangle. I didn't think anyone would recognize it as a pistol bag. I figured folks would think it was just a triangular bag, made for cycling. However, on several occasions, we've been out riding and had people mention her packing heat. "Is that your daughter with the gun?" and "Certainly, she can't be old enough for a CHL."