I have a 1950's O'Keefe and Merritt stove. Today while baking, I opened the door and heard a sound between a pop, a crack, and a bang and now the oven door feels a lot looser and doesn't quite shut as tightly. I'm assuming that it is one of the springs that broke. So... I know I can get parts from a few sources, but how in the heck do I figure out what part I need? Given instructions, I'm quite handy, but I'm not sure where I need to look for the hinges/springs as I just see the fixed metal brackets that attach to the door. They go into the sides of the oven. Is there a plate or a panel I'm supposed to remove?