problem removing 84-001 roller

Dear Michael,
I have an aluminum sliding insect screen that is about eight years old. It has rollers similar to your 88-001 model. Some of the roller wheels are missing. I removed the screws that lock it in from the screen side. I can see and locate the hole in the 88-001, but I can not move the spring to remove the device so I can order a replacement roller. I am seeking a way to grab the spring metal pressing and holding the device so I can remove it. Do you have any suggestions or a tool to use. I tried using a narrow ice p;sick to move the spring to no avail. Thanks. Ed