Can go visit NPC, they have some on display and sale.
But, unlike car alarms. It doesnt really errrmmmm sound as
loud.
And errmmm.....like car alarms. Maybe go people might notice, but
errrmmm not lily people will go check out the alarms.
Your best bet is still training your gf to scream and shout loudly,
spray the hairspray/perfume or at least you accompany your g/f for
self defence classes.
She should also be advised on how to remember what the attacker
looks like, and giving a statement later for apprehending the
attackers and charge them in court.
