I plan to make a paracord belt (substantial amount of cordage, plenty of attachment points), and have been looking for a no nonsense "survival" buckle for it as well. Unfortunately, this one will not work for me, as it's friction based, which is good with the webbing only (and the webbing must be of a certain width and thickness to work well with that one). The best option I've found so far: http://www.amazon.com/686-Mens-Surplus-Toolbelt-Large/dp/B00SGQT182



...but somewhat expensive, especially knowing that I will ditch the belt itself

Also I like the Gerber belt idea with the hidden container:



Perhaps, I should just 3D print a similar design, but for a paracord belt.

Another very appealing idea, but significantly less casual:



reserved for the hiking pants.