I removed the towing receiver from my '87 Suburban V20 a few years ago to drop the fuel tank. I seem to have lost the thick plates with the threaded holes that go on the top of the frame for the receiver bolts to go through. Does anyone know if you can buy those someplace or even what they are actually called. I think I have a photo of the one I didn't lose. I'll try to find it to post here. But basically they are just steel plates with threaded bolt holes. I'm having a really hard time trying to find anything like it for sale online. Thanks!