Love the feel of this shoe, it gets forced on me by every sales person ever, but hopelessly wide for my foot.
Try the Saucony Freedom ISO. I have very narrow feet and they are working for me.
I agree with the useful tips in the previous responses but on the other hand maybe it's really better to buy the new, more comfortable shoes for your narrow feet? :) There are some good models for your case in different brand series... Try to search through Nike and Adidas models, also some of such peak shoes http://stylemann.com/best-peak-shoes-review/ are fine :)
I run about 50 mpw right now exclusively in brooks pureflow. No matter how much I try I cannot find another 4mm drop minimalist shoe that fits my foot like they do to prevent heel slippage (yes I do try different lacing techniques) While I enjoy the pureflows I do suffer from some minor aches and pains and I think having a more cushioned shoe for general training would be a good idea. I just can't find one that hugs my foot as tight. Anyone with a similar problem that could suggest a more cushioned yet narrow shoe?