ORB fittings may not be "special", but they are not a common fitting used by the material handling (forklifts), construction, (skid steers, backhoes, etc.) or lift gate industries. When I did my AP, I contacted 6 (six) hydraulic/fittings shops in the Chicago area and none of them carried ORB fittings because they are not used in the previously mentioned industries. In an effort to control inventory costs, many shops no longer stock what does not sell.
Jay