boatmaninc

I am working on a Singer 29K60. I am having trouble making sense of parts that are missing. I'm pretty sure that this machine as a part from another machine in the place of the "foot bar revolving join slide rod lock nut" (upper) (113101). I can't find a replacement online. Any ideas? I've also figured out that this part is missing - 82166 THREAD TAKE UP ADJ ASSY SINGER 29K. Is there a good place to purchase 29k parts? Thank you.