In your country gun laws are very strict and without any criminal contacts acquiring illegal firearms seems impracticable. In fact, anything useful for self defence is banned.
You might find a darknet gun store that isn't a scam or police but you wouldn't know until it's too late. Limited by funds and intel, you may have to resort to baseball bats if you can't find anything.

roll 1d100
best of three rolls from 3 different users
the higher the roll the better quality of weapon you acquire.

...

You return home with Jesse and start pushing her to study up on security and intelligence (so far she's been relying on End-to-end-encrypted voip for any serious discussion of swapping.)
And what better source of information than the 4chan?

Threads discussing swapping are now appearing daily, you see some of your own disinformation is still being posted. Excerpts from the edited recording of Jesse's swap are posted too. If her face were visible millions of people could has seen it. Swapping is still widely regarded as fake.
Jesse: "Sure, I'll try and study up some of this stuff while you try to find a weapon. Just be careful."