I have very narrow ankles, too (just measured them, same 8") and totally sympathize with the situation. I have found that what often has a chance of working are so-called "sock booties", booties with elastic insets, and higher shaft booties in general. Unfortunately, also that higher priced shoe brands (Stuart Weitzman, Aquatalia, etc.) are more likely to work.
I am not familiar with those booties. I have attached some that have worked for me (older tough), but those may not be the types you are looking for.