After taking the NOLS/WMI Wilderness First Aid course I started looking at the NOLS Med Kits. One of the "kits" is an empty bag -- NOLS-Med-Kit-Bag -- which by way of a side-by-side comparison I found to be identical to the AMK Weekender in dimensions and layout. The only difference I can see is that the NOLS Med Kit is red instead of blue.

IMO this is a very useful size bag for small groups. It may not be as big as the single kit that Jeanette links to in her Build a Wilderness First Aid Kit Thread, but it may be more convenient for smaller groups or individuals who want to tailor their kit(s).