Off Body Carry Bag (grrr)

I'm losing my freaking marbles trying to find an off body carry bag. It doesn't need to be explicitly for concealed carry. In fact it seems like a lot of bags that are made for concealed carry are absolutely terrible. I have Velcro and a kydex holster I'm going to put in the carry compartment so it can really be any decent bag that fits my gun and meets a few specific requirements.

Here are my requirements: - must fit my Ruger Security 9 (same size as Glock 19) - must have a separate compartment for the firearm - firearm must point barrel down - carry compartment must have either a magnetic clasp or button closure. No zippers.

I'm looking for something that can be worn cross body, that's isn't too big (~10x12in) Ideally a normal bag / purse situation. Not a big stupid chest sling fanny pack that screams "I have a handgun in here."

P.S. I'm not here to talk about the viability of off body carry. I'm aware of the pros and cons.