airsail: No idea how many of these types of parts are floating around awaiting recertification.
While there still are those types of parts floating around in the system, their numbers have been decreasing in my experience thanks to technology. Once where the only records were local hardcopies are now part of a digital system that can be accessed on a global scale. Unfortunately, there still are operators who look for the cheapest path to follow which keeps that part of the system viable.