Roller wheel replacement

Good afternoon. I need to replace the roller wheels on this screen sliding doors to my condominium. It was built in the 1980s or early 90s. I believe these are all the original doors. I can find no markings for the manufacture. The nylon wheels have been chewed up and keep coming off the track. They have a screw adjustment and based on some research I believe them to be a corner brace roller wheel assembly. Can the wheels be removed without having to take out the whole corner assembly. That seems like he would have to take apart the screen door. I did see one video that showed the wheel itself being removed And it had a spring attached to it in a corner brace assembly. I have included some pictures to see if you can identify the manufacturer or the part needed. I have four sets of screen doors that need all four wheel assemblies replaced, so that is a total of 16 wheel assemblies .