Buy more guns.
For those in countries that restrict gun ownership, check your country's laws on replica black-powder firearms. Often they will categorize those as non-firearms, which makes them very easy to buy and possibly legal to carry, but read all the relevant laws to make sure. Also check the self-defense laws to see if using such a gun in self-defense is legal (e.g. self-defense with anything other than your fists is basically illegal in Britain).
Replica cap-and-ball revolvers (e.g. this) can be made reliable if you do your research (e.g. InRangeTV has a few good videos on the topic). People who do Cowboy Action matches also have a lot of info on this topic.
Of course, there is also 3D printed guns.
I forgot to mention: You can easily carry a snub-nose cap-and-ball revolver in a kydex appendix holster. You'll probably have to make one yourself, but that's not too difficult to do. Here's an example (minus the sidecart attachment aspect, though). And make sure to carry the revolver with the hammer on one of the safety notches!
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Kydex holster for normal glocks work well too. Key is to practice dry firing to build muscle memory.
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