I recently have restored an old 34K post bed machine. Unfortunately I have upset it and now the needle bar is bent. No way to get it straight again. So I need a replacement but as you would assume spare parts are no longer available. I assume the needle bar of a Singer 17 or 18 class would fit but I´m not 100% sure. So what I would ask you guys for is if you could please measure the diameter and length of your Singer 17, 18, 31, 16, 128, 96 or similar machines so I can compare the measures. T