I am having trouble finding women's climbing shoes for narrow feet, any suggestions?

I have really narrow feet as well and I love the Mythos (ladies, the light green ones) for smearing and cracks and use the Katana's for more high-performance stuff. Oddly enough, I use the men's Katana (gold) as the women's is much softer and not much lower in volume.
Remember, Mythos shrink a bunch after you wear them a couple weeks.

Correction: Mythos GROW a bunch; not shrink.

It helps if you also tell us what kind of climbing specifically you'll be doing.

I have very narrow feet and I find Evolve always seems to fit me.

For trad, I wear the women's Mythos and the evolv Elektras.

For sport climbing, I wear the evolv Athenas (although they no longer make them, but I tried on the Hera and it fits very well too).

Also, Mad Rock Banshees are very narrow shoes, albeit more of a trad shoe.

Good luck.

The Mythos seem to be a good fit for a lot of climbers. My feet are wide and these shoes are still comfortable even on multipitch routes (must be the stretch factor). I'd highly recommend giving these a try.

I have ridiculously narrow (and unfortunately long) feet. I have two pairs of shoes that I adore: The Sirens, by 5.10. They are a delectible shoe for long routes, cracks or moderate sport. I also have La Sportiva W's Katanas... These are also terrific - more aggresively so - and have velcro for added adjustment (and quick removal!)

OKAY -- I'll admit it. I'm not a woman AND don't have any women's shoes... but, I do have really narrow, low volume feet.

I can confirm that with the Mythos (at least the men's) stay narrow on narrow feet. I was concerned about stretch when I bought my first pair, as I had always heard they stretched extensively for a good fit for folks with wide feet.

However, now they're the only type of shoes I own (because of the fit). Everyone needs a pair of mythos.

Sportiva, traditionally narrow, 5.10 traditionally wider. Leather uppers stretch across the last not along the last, nothing stretches along the last. Synthetics stretch a bit too, just not as nicely as leather. Assess the last. What do you want the shoe to do? Comfort? Tech? Somewhere in between? Figure out what kind of last you need. A stiff last? A soft last? Once you know that start trying them on, don't stop until you have tried all of them, make sure your foot fills the shoe and remember that width stretches a bit which sucks when shoes are new, but it brings it all together once you brave the pain and find yourself loving the custom fit payoff.

I have a med width foot so I am fortunate.
Personally I have a pair of Anasazi Velcros for techy face climbs and bouldering and a pair of mythos for trad, and splitters, they love splitters.