Large Pocket Wrench Roll

[Gangly]

I love a good, well oiled, duck canvas, wrench roll.  The plastic ones don't seem to last as long due to brittleness with age, and they can get sloppy with oils.  I keep various box end combination wrench sets in duck canvas wrench rolls, but I have yet to find one that will allow the proper fitment of a 15 piece ratcheting wrench set, specifically the Milwaukee Flex Head wrenches.  The wrench slots on every one I have tried, or read about, are too small and I cant fit the Flex Head wrenches in the slots.  Does anybody know of a wrench roll that will for sure accommodate larger flex head wrenches, specifically the Milwaukee Flex Heads?