I know for a fact that Snap On makes thin double open end wrenches because I've seen them, but don't know the part number. And Armstrong either makes or used to make thin double open end wrenches as well. Also, I'm 99% sure I saw some thin service wrenches on the William's site recently that boast about a thin profile that allows you to reach fasteners in confined spaces. They're the type with just one single open end and nothing on the other end. I can't remember what they call those, but William's had them listed under "service wrenches" I believe. There's three places to look.