my beloved brown gladiators

It's March, and temperatures have been in the 70s in Alabama. Yesterday, I went to slip on my favorite brown sandals (see left) by CL for Laundry (DSW find), and I walked right out of them. I have a problem...my feet are extremely thin and narrow. Gladiators are really hard for me to wear (well almost any sandal for that matter) because I cannot keep them on my feet. These favorite gladiators of mine have gone through a lot in the past 2 years. On different occasions I lost both heels and the soles began to "talk." I had them practically remade and had new holes put in them in an attempt to keep them on my tiny feet. I love these shoes so much that I was hoping I could find them online--no such luck. All I found was a size 9, medium width. I'm a size 7, although I usually wear a 6.5 in sandals to try to make up for the tininess of my foot. So, I am forced to find a new pair of sandals. Any suggestions out there that won't break the bank? Any girls out there that have the same problem as me? Any feedback would be much appreciated!