I use a Ridgid tool bag from Home Depot & have been for a few years. I put my pistol (up to 4) in a hard case. It has plenty of room for my plugs/muffs, extra mags, ammo, id badge, tools (allen wrenches, screw drivers, torx bits, etc.) Also has enough room for stapler & cleaning supplies id wanted. I believe I paid about $35 or so.
Works for me anyway.