I live here in Phoenix and love it. Nowhere else have I seen such an abundance of quilt shops.
3 Dudes Quilting has a map of all the Maricopa County quilt shop association. They will gladly provide it to you for free. If you are from out of town I imagine they would e-m it to you.
There are more quilt shops than are on their map. That map is only for those shops that belong to that association and there are requirements as to who can join.
Having said that, there are many more quilt shops here. The largest material selection in the entire state is at 35th Ave Sew & Vac. You wouldn't believe how big that store is.
If you are visiting then you would want to coordinate visiting with your other activities. If you live here, then you can take your time.
PM me if you want more info.