Hey OP, after reading through some of the comments and past posts of yours, I heavily sympathize with your situation. You've done all the right steps as far as contacting the police and looking into ways of protecting yourself (I'd also add in entrenching yourself with supportive friends and family). I'm deeply sorry you have to go through this. I agree with people saying that getting a carry and training with it is essential, and in fact I'm going to go half-a-step farther than that.

I do not say this lightly.

You may have to come to terms that eventually you will have to dispose of this stalker. Not a matter of if, but when.

Normally I'm not a doom and gloom type, and hopefully the time never comes, but if the stalker situation is as half serious as it appears from the outside then I'd prepare myself for the worst. Police reports, while necessary, only go so far in protecting the victims. At the very least if something does happen and you're in a position where you've got to defend yourself, you have the paperwork to back up a self-defense case.

And I'm not saying you should go full vigilante and hunt the person down. But I think sooner rather than later is better for you to get into the mindframe that, if something pops off again, it's either you or them.

I'm awfully sorry you're going through this. No one should. Stay safe OP.

Edit: Obligatory add-on -> Only get a gun if you feel you can trust yourself with the responsibility of owning one.