I have a couple of panels from the electric utility industry that contain several (4 per panel) 8 pin & 4 pin (4 per panel) tube sockets in addition to toggle switches, rotary switches (single pole 4 position, 3 per panel, no idea on ratings), fuse holders, etc. The sockets are riveted to the panel but I can remove them without damage to the sockets. I thought I'd offer these here before tossing them into the recycling bin.?