I’ve been after Mystery Ranch to let me run their IFAK. It’s been under development and refinement for awhile and it’s almost ready to order (Kent says 60 days). As you can see it is a butterfly design that opens up to reveal your medical equipment.
It features a PALS attachment on the rear so you can attach it to your equipment.
It’s also available in a larger VLAK (Vehicle Litter Aid Kit) that is basically double the size of the IFAK. Mystery Ranch will also offer them kitted with medical supplies from North American Rescue.