Just wanted to say thanks to everyone who has contributed to the forum regarding thread injectors (especially Ramblin Rev). Thanks to all of your advice, I found a great Singer for a great price at a local sewing repair shop. I'm not sure the model number, this thing was built before they put model numbers on them. It only has a serial number. It's nothing fancy, but it's built like a tank and simple enough even I can repair it (I think).
Now it's time to start building some gear. First up a new top quilt.