dandspach

I recently picked up a Nakajima TDU-N62 and need to find a couple parts: Lower needle thread guide. It is completely missing. Can someone suggest a replacement part? I've been searching for several hours online and can't seem to find one. Perhaps a generic part would work? Maybe something to fit the Singer 16-188 model? Replacement take up spring (after lower thread tensioner, but before the take-up arm). Again, something generic? Any links to parts would be much appreciated...