I'd recommend an itp A6 Polestar. It uses 6xAAs and a side-switch. It is fatter than yours but not nearly as long (about 8 inches) and fits nicely in the hand. Comes with holster and lanyard.
Using AA batteries is HUGE cuz giving someone a light with dangerous specialty batteries is idiocy to be blunt. With 6xAAs, it will put out about as much light as yours, except in a better form factor for her.
Runtime will be decent (less than yours tho) and with 3 brightness levels and its ability to memorize the last used mode, you can effectively use it as a 1-mode light.
It is 72 bucks shipped from goinggear with ggcpf10 coupon code. Expensive, but I think its a better option than a 2xAA light that will be dimmer and have less runtime.
I figure if you are giving away a light, give a really good one. I gave my father-in-law and dad these lights (and cousin) and they love them.
I recommend giving a 4pack and 2pack with 4slot/2slot chargers of Eneloop AAs from amazon. Its 30 bucks for both packs but lets her charge ALL 6 batteries at once which I think is very important for a frequent user like she will be. Though she might need or be able to use a car-charger that does AAs of some kind.