AWS Inc. offers a full line of standard and custom IR patches including their new Gen III reversible call sign patch. The Gen III version of these patches is unique in that it is reversible but only requires hook Velcro on one side. Organizations can configure every detail of the patch including the color and text for each side.
They also make flag patches with integrated pouches behind the patch which I suspect many people will find handy for EDC.
Check out all of the patch offerings at AWS.